diff options
26 files changed, 503 insertions, 117 deletions
diff --git a/absl/abseil.podspec.gen.py b/absl/abseil.podspec.gen.py new file mode 100755 index 000000000000..2bf153c002ab --- /dev/null +++ b/absl/abseil.podspec.gen.py @@ -0,0 +1,247 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- +"""This script generates abseil.podspec from all BUILD.bazel files. + +This is expected to run on abseil git repository with Bazel 1.0 on Linux. +It recursively analyzes BUILD.bazel files using query command of Bazel to +dump its build rules in XML format. From these rules, it constructs podspec +structure. +""" + +import argparse +import collections +import os +import re +import subprocess +import xml.etree.ElementTree + +# Template of root podspec. +SPEC_TEMPLATE = """ +# This file has been automatically generated from a script. +# Please make modifications to `abseil.podspec.gen.py` instead. +Pod::Spec.new do |s| + s.name = 'abseil' + s.version = '${version}' + s.summary = 'Abseil Common Libraries (C++) from Google' + s.homepage = 'https://abseil.io' + s.license = 'Apache License, Version 2.0' + s.authors = { 'Abseil Team' => 'abseil-io@googlegroups.com' } + s.source = { + :git => 'https://github.com/abseil/abseil-cpp.git', + :tag => '${tag}', + } + s.module_name = 'absl' + s.header_mappings_dir = 'absl' + s.header_dir = 'absl' + s.libraries = 'c++' + s.compiler_flags = '-Wno-everything' + s.pod_target_xcconfig = { + 'USER_HEADER_SEARCH_PATHS' => '$(inherited) "$(PODS_TARGET_SRCROOT)"', + 'USE_HEADERMAP' => 'NO', + 'ALWAYS_SEARCH_USER_PATHS' => 'NO', + } + s.ios.deployment_target = '7.0' + s.osx.deployment_target = '10.9' + s.tvos.deployment_target = '9.0' + s.watchos.deployment_target = '2.0' +""" + +# Limited platforms that abseil supports. +# This is mainly because of sigaltstack unavailable on watchOS. +LIMITED_SUPPORT_PLATFORMS = [ + "ios.deployment_target = '7.0'", + "osx.deployment_target = '10.9'", +] + +# Custom specification per rule. +CUSTOM_SPEC_MAP = { + "//absl/debugging:failure_signal_handler": LIMITED_SUPPORT_PLATFORMS, +} + +# Rule object representing the rule of Bazel BUILD. +Rule = collections.namedtuple( + "Rule", "type name package srcs hdrs textual_hdrs deps visibility testonly") + + +def get_elem_value(elem, name): + """Returns the value of XML element with the given name.""" + for child in elem: + if child.attrib.get("name") != name: + continue + if child.tag == "string": + return child.attrib.get("value") + if child.tag == "boolean": + return child.attrib.get("value") == "true" + if child.tag == "list": + return [nested_child.attrib.get("value") for nested_child in child] + raise "Cannot recognize tag: " + child.tag + return None + + +def normalize_paths(paths): + """Returns the list of normalized path.""" + # e.g. ["//absl/strings:dir/header.h"] -> ["absl/strings/dir/header.h"] + return [path.lstrip("/").replace(":", "/") for path in paths] + + +def parse_rule(elem, package): + """Returns a rule from bazel XML rule.""" + return Rule( + type=elem.attrib["class"], + name=get_elem_value(elem, "name"), + package=package, + srcs=normalize_paths(get_elem_value(elem, "srcs") or []), + hdrs=normalize_paths(get_elem_value(elem, "hdrs") or []), + textual_hdrs=normalize_paths(get_elem_value(elem, "textual_hdrs") or []), + deps=get_elem_value(elem, "deps") or [], + visibility=get_elem_value(elem, "visibility") or [], + testonly=get_elem_value(elem, "testonly") or False) + + +def read_build(package): + """Runs bazel query on given package file and returns all cc rules.""" + result = subprocess.check_output( + ["bazel", "query", package + ":all", "--output", "xml"]) + root = xml.etree.ElementTree.fromstring(result) + return [ + parse_rule(elem, package) + for elem in root + if elem.tag == "rule" and elem.attrib["class"].startswith("cc_") + ] + + +def collect_rules(root_path): + """Collects and returns all rules from root path recursively.""" + rules = [] + for cur, _, _ in os.walk(root_path): + build_path = os.path.join(cur, "BUILD.bazel") + if os.path.exists(build_path): + rules.extend(read_build("//" + cur)) + return rules + + +def relevant_rule(rule): + """Returns true if a given rule is relevant when generating a podspec.""" + return ( + # cc_library only (ignore cc_test, cc_binary) + rule.type == "cc_library" and + # ignore empty rule + (rule.hdrs + rule.textual_hdrs + rule.srcs) and + # ignore test-only rule + not rule.testonly) + + +def get_spec_var(depth): + """Returns the name of variable for spec with given depth.""" + return "s" if depth == 0 else "s{}".format(depth) + + +def get_spec_name(label): + """Converts the label of bazel rule to the name of podspec.""" + assert label.startswith("//absl/"), "{} doesn't start with //absl/".format( + label) + # e.g. //absl/apple/banana -> abseil/apple/banana + return "abseil/" + label[7:] + + +def write_podspec(f, rules, args): + """Writes a podspec from given rules and args.""" + rule_dir = build_rule_directory(rules)["abseil"] + # Write root part with given arguments + spec = re.sub(r"\$\{(\w+)\}", lambda x: args[x.group(1)], + SPEC_TEMPLATE).lstrip() + f.write(spec) + # Write all target rules + write_podspec_map(f, rule_dir, 0) + f.write("end\n") + + +def build_rule_directory(rules): + """Builds a tree-style rule directory from given rules.""" + rule_dir = {} + for rule in rules: + cur = rule_dir + for frag in get_spec_name(rule.package).split("/"): + cur = cur.setdefault(frag, {}) + cur[rule.name] = rule + return rule_dir + + +def write_podspec_map(f, cur_map, depth): + """Writes podspec from rule map recursively.""" + for key, value in sorted(cur_map.items()): + indent = " " * (depth + 1) + f.write("{indent}{var0}.subspec '{key}' do |{var1}|\n".format( + indent=indent, + key=key, + var0=get_spec_var(depth), + var1=get_spec_var(depth + 1))) + if isinstance(value, dict): + write_podspec_map(f, value, depth + 1) + else: + write_podspec_rule(f, value, depth + 1) + f.write("{indent}end\n".format(indent=indent)) + + +def write_podspec_rule(f, rule, depth): + """Writes podspec from given rule.""" + indent = " " * (depth + 1) + spec_var = get_spec_var(depth) + # Puts all files in hdrs, textual_hdrs, and srcs into source_files. + # Since CocoaPods treats header_files a bit differently from bazel, + # this won't generate a header_files field so that all source_files + # are considered as header files. + srcs = sorted(set(rule.hdrs + rule.textual_hdrs + rule.srcs)) + write_indented_list( + f, "{indent}{var}.source_files = ".format(indent=indent, var=spec_var), + srcs) + # Writes dependencies of this rule. + for dep in sorted(rule.deps): + name = get_spec_name(dep.replace(":", "/")) + f.write("{indent}{var}.dependency '{dep}'\n".format( + indent=indent, var=spec_var, dep=name)) + # Writes custom specification. + custom_spec = CUSTOM_SPEC_MAP.get(rule.package + ":" + rule.name) + if custom_spec: + for spec in custom_spec: + f.write("{indent}{var}.{spec}\n".format( + indent=indent, var=spec_var, spec=spec)) + + +def write_indented_list(f, leading, values): + """Writes leading values in an indented style.""" + f.write(leading) + f.write((",\n" + " " * len(leading)).join("'{}'".format(v) for v in values)) + f.write("\n") + + +def generate(args): + """Generates a podspec file from all BUILD files under absl directory.""" + rules = filter(relevant_rule, collect_rules("absl")) + with open(args.output, "wt") as f: + write_podspec(f, rules, vars(args)) + + +def main(): + parser = argparse.ArgumentParser( + description="Generates abseil.podspec from BUILD.bazel") + parser.add_argument( + "-v", "--version", help="The version of podspec", required=True) + parser.add_argument( + "-t", + "--tag", + default=None, + help="The name of git tag (default: version)") + parser.add_argument( + "-o", + "--output", + default="abseil.podspec", + help="The name of output file (default: abseil.podspec)") + args = parser.parse_args() + if args.tag is None: + args.tag = args.version + generate(args) + + +if __name__ == "__main__": + main() diff --git a/absl/base/BUILD.bazel b/absl/base/BUILD.bazel index 6fc712d968f3..7e234bc66779 100644 --- a/absl/base/BUILD.bazel +++ b/absl/base/BUILD.bazel @@ -192,7 +192,9 @@ cc_library( ], copts = ABSL_DEFAULT_COPTS, linkopts = select({ - "//absl:windows": [], + "//absl:windows": [ + "-DEFAULTLIB:shlwapi.lib", + ], "//conditions:default": ["-pthread"], }) + ABSL_DEFAULT_LINKOPTS, deps = [ diff --git a/absl/base/CMakeLists.txt b/absl/base/CMakeLists.txt index 9550cdb2db49..7ab6955e2176 100644 --- a/absl/base/CMakeLists.txt +++ b/absl/base/CMakeLists.txt @@ -14,6 +14,8 @@ # limitations under the License. # +find_library(LIBRT rt) + absl_cc_library( NAME atomic_hook @@ -163,16 +165,18 @@ absl_cc_library( "internal/thread_identity.h" "internal/tsan_mutex_interface.h" "internal/unscaledcycleclock.h" - "log_severity.h" SRCS "internal/cycleclock.cc" "internal/spinlock.cc" "internal/sysinfo.cc" "internal/thread_identity.cc" "internal/unscaledcycleclock.cc" - "log_severity.cc" COPTS ${ABSL_DEFAULT_COPTS} + LINKOPTS + ${ABSL_DEFAULT_LINKOPTS} + $<$<BOOL:${LIBRT}>:${LIBRT}> + $<$<BOOL:${MINGW}>:"shlwapi"> DEPS absl::atomic_hook absl::base_internal diff --git a/absl/base/attributes.h b/absl/base/attributes.h index 7b7656a859b8..acd1c5269829 100644 --- a/absl/base/attributes.h +++ b/absl/base/attributes.h @@ -158,9 +158,11 @@ // Weak attributes currently do not work properly in LLVM's Windows backend, // so disable them there. See https://bugs.llvm.org/show_bug.cgi?id=37598 // for further information. -#if (ABSL_HAVE_ATTRIBUTE(weak) || \ +// The MinGW compiler doesn't complain about the weak attribute until the link +// step, presumably because Windows doesn't use ELF binaries. +#if (ABSL_HAVE_ATTRIBUTE(weak) || \ (defined(__GNUC__) && !defined(__clang__))) && \ - !(defined(__llvm__) && defined(_WIN32)) + !(defined(__llvm__) && defined(_WIN32)) && !defined(__MINGW32__) #undef ABSL_ATTRIBUTE_WEAK #define ABSL_ATTRIBUTE_WEAK __attribute__((weak)) #define ABSL_HAVE_ATTRIBUTE_WEAK 1 diff --git a/absl/base/call_once.h b/absl/base/call_once.h index 4aa6360cffc5..e1614e517a8d 100644 --- a/absl/base/call_once.h +++ b/absl/base/call_once.h @@ -148,7 +148,7 @@ void CallOnceImpl(std::atomic<uint32_t>* control, Args&&... args) { #ifndef NDEBUG { - uint32_t old_control = control->load(std::memory_order_acquire); + uint32_t old_control = control->load(std::memory_order_relaxed); if (old_control != kOnceInit && old_control != kOnceRunning && old_control != kOnceWaiter && @@ -166,14 +166,23 @@ void CallOnceImpl(std::atomic<uint32_t>* control, // Must do this before potentially modifying control word's state. base_internal::SchedulingHelper maybe_disable_scheduling(scheduling_mode); // Short circuit the simplest case to avoid procedure call overhead. + // The base_internal::SpinLockWait() call returns either kOnceInit or + // kOnceDone. If it returns kOnceDone, it must have loaded the control word + // with std::memory_order_acquire and seen a value of kOnceDone. uint32_t old_control = kOnceInit; if (control->compare_exchange_strong(old_control, kOnceRunning, - std::memory_order_acquire, std::memory_order_relaxed) || base_internal::SpinLockWait(control, ABSL_ARRAYSIZE(trans), trans, scheduling_mode) == kOnceInit) { base_internal::Invoke(std::forward<Callable>(fn), std::forward<Args>(args)...); + // The call to SpinLockWake below is an optimization, because the waiter + // in SpinLockWait is waiting with a short timeout. The atomic load/store + // sequence is slightly faster than an atomic exchange: + // old_control = control->exchange(base_internal::kOnceDone, + // std::memory_order_release); + // We opt for a slightly faster case when there are no waiters, in spite + // of longer tail latency when there are waiters. old_control = control->load(std::memory_order_relaxed); control->store(base_internal::kOnceDone, std::memory_order_release); if (old_control == base_internal::kOnceWaiter) { diff --git a/absl/base/policy_checks.h b/absl/base/policy_checks.h index 699fb1a2e0fc..4dfa49e54ac2 100644 --- a/absl/base/policy_checks.h +++ b/absl/base/policy_checks.h @@ -82,16 +82,6 @@ // Standard Library Check // ----------------------------------------------------------------------------- -// We have chosen glibc 2.12 as the minimum as it was tagged for release -// in May, 2010 and includes some functionality used in Google software -// (for instance pthread_setname_np): -// https://sourceware.org/ml/libc-alpha/2010-05/msg00000.html -#if defined(__GLIBC__) && defined(__GLIBC_PREREQ) -#if !__GLIBC_PREREQ(2, 12) -#error "Minimum required version of glibc is 2.12." -#endif -#endif - #if defined(_STLPORT_VERSION) #error "STLPort is not supported." #endif diff --git a/absl/container/internal/hashtablez_sampler.cc b/absl/container/internal/hashtablez_sampler.cc index 0a7ef61c8fe5..4aec0a07ffb3 100644 --- a/absl/container/internal/hashtablez_sampler.cc +++ b/absl/container/internal/hashtablez_sampler.cc @@ -38,16 +38,18 @@ ABSL_CONST_INIT std::atomic<bool> g_hashtablez_enabled{ ABSL_CONST_INIT std::atomic<int32_t> g_hashtablez_sample_parameter{1 << 10}; ABSL_CONST_INIT std::atomic<int32_t> g_hashtablez_max_samples{1 << 20}; -#if ABSL_HAVE_THREAD_LOCAL -thread_local absl::base_internal::ExponentialBiased - g_exponential_biased_generator; -#else -ABSL_CONST_INIT static absl::base_internal::ExponentialBiased +#if ABSL_PER_THREAD_TLS == 1 +ABSL_PER_THREAD_TLS_KEYWORD absl::base_internal::ExponentialBiased g_exponential_biased_generator; #endif } // namespace +#if ABSL_PER_THREAD_TLS == 1 +ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample = 0; +#endif // ABSL_PER_THREAD_TLS == 1 + + HashtablezSampler& HashtablezSampler::Global() { static auto* sampler = new HashtablezSampler(); return *sampler; @@ -189,6 +191,10 @@ HashtablezInfo* SampleSlow(int64_t* next_sample) { return HashtablezSampler::Global().Register(); } +#if ABSL_PER_THREAD_TLS == 0 + *next_sample = std::numeric_limits<int64_t>::max(); + return nullptr; +#else bool first = *next_sample < 0; *next_sample = g_exponential_biased_generator.Get( g_hashtablez_sample_parameter.load(std::memory_order_relaxed)); @@ -210,12 +216,9 @@ HashtablezInfo* SampleSlow(int64_t* next_sample) { } return HashtablezSampler::Global().Register(); +#endif } -#if ABSL_PER_THREAD_TLS == 1 -ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample = 0; -#endif // ABSL_PER_THREAD_TLS == 1 - void UnsampleSlow(HashtablezInfo* info) { HashtablezSampler::Global().Unregister(info); } diff --git a/absl/container/internal/hashtablez_sampler.h b/absl/container/internal/hashtablez_sampler.h index 53996bb9fa4c..c694df057d8e 100644 --- a/absl/container/internal/hashtablez_sampler.h +++ b/absl/container/internal/hashtablez_sampler.h @@ -186,16 +186,14 @@ extern ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample; // Returns an RAII sampling handle that manages registration and unregistation // with the global sampler. inline HashtablezInfoHandle Sample() { -#if ABSL_PER_THREAD_TLS == 0 - static auto* mu = new absl::Mutex; - static int64_t global_next_sample = 0; - absl::MutexLock l(mu); -#endif // !ABSL_HAVE_THREAD_LOCAL - +#if ABSL_PER_THREAD_TLS == 1 if (ABSL_PREDICT_TRUE(--global_next_sample > 0)) { return HashtablezInfoHandle(nullptr); } return HashtablezInfoHandle(SampleSlow(&global_next_sample)); +#else + return HashtablezInfoHandle(nullptr); +#endif // !ABSL_PER_THREAD_TLS } // Holds samples and their associated stack traces with a soft limit of diff --git a/absl/container/internal/hashtablez_sampler_test.cc b/absl/container/internal/hashtablez_sampler_test.cc index 7f9e8dd21ffc..af4b5ee108ac 100644 --- a/absl/container/internal/hashtablez_sampler_test.cc +++ b/absl/container/internal/hashtablez_sampler_test.cc @@ -168,6 +168,7 @@ TEST(HashtablezInfoTest, RecordRehash) { EXPECT_EQ(info.num_erases.load(), 0); } +#if ABSL_PER_THREAD_TLS == 1 TEST(HashtablezSamplerTest, SmallSampleParameter) { SetHashtablezEnabled(true); SetHashtablezSampleParameter(100); @@ -211,6 +212,7 @@ TEST(HashtablezSamplerTest, Sample) { } EXPECT_NEAR(sample_rate, 0.01, 0.005); } +#endif TEST(HashtablezSamplerTest, Handle) { auto& sampler = HashtablezSampler::Global(); diff --git a/absl/container/internal/raw_hash_set.h b/absl/container/internal/raw_hash_set.h index bf0c03c44f2e..469226fedd86 100644 --- a/absl/container/internal/raw_hash_set.h +++ b/absl/container/internal/raw_hash_set.h @@ -638,8 +638,8 @@ class raw_hash_set { } friend bool operator==(const iterator& a, const iterator& b) { - /* To be enabled: a.assert_is_valid(); */ - /* To be enabled: b.assert_is_valid(); */ + a.assert_is_valid(); + b.assert_is_valid(); return a.ctrl_ == b.ctrl_; } friend bool operator!=(const iterator& a, const iterator& b) { diff --git a/absl/container/internal/raw_hash_set_test.cc b/absl/container/internal/raw_hash_set_test.cc index 33cfa72ce7ab..ec8f92313bac 100644 --- a/absl/container/internal/raw_hash_set_test.cc +++ b/absl/container/internal/raw_hash_set_test.cc @@ -1841,6 +1841,7 @@ TEST(TableDeathTest, EraseOfEndAsserts) { EXPECT_DEATH_IF_SUPPORTED(t.erase(t.end()), kDeathMsg); } +#if ABSL_PER_THREAD_TLS == 1 TEST(RawHashSamplerTest, Sample) { // Enable the feature even if the prod default is off. SetHashtablezEnabled(true); @@ -1861,6 +1862,7 @@ TEST(RawHashSamplerTest, Sample) { EXPECT_NEAR((end_size - start_size) / static_cast<double>(tables.size()), 0.01, 0.005); } +#endif TEST(RawHashSamplerTest, DoNotSampleCustomAllocators) { // Enable the feature even if the prod default is off. diff --git a/absl/debugging/BUILD.bazel b/absl/debugging/BUILD.bazel index beec279ff8e2..2601090bc60b 100644 --- a/absl/debugging/BUILD.bazel +++ b/absl/debugging/BUILD.bazel @@ -55,7 +55,10 @@ cc_library( "symbolize.h", ], copts = ABSL_DEFAULT_COPTS, - linkopts = ABSL_DEFAULT_LINKOPTS, + linkopts = ABSL_DEFAULT_LINKOPTS + select({ + "//absl:windows": ["-DEFAULTLIB:dbghelp.lib"], + "//conditions:default": [], + }), deps = [ ":debugging_internal", ":demangle_internal", diff --git a/absl/debugging/CMakeLists.txt b/absl/debugging/CMakeLists.txt index b3e35b6d744e..eff504b48832 100644 --- a/absl/debugging/CMakeLists.txt +++ b/absl/debugging/CMakeLists.txt @@ -44,6 +44,7 @@ absl_cc_library( ${ABSL_DEFAULT_COPTS} LINKOPTS ${ABSL_DEFAULT_LINKOPTS} + $<$<BOOL:${MINGW}>:"dbghelp"> DEPS absl::debugging_internal absl::demangle_internal diff --git a/absl/functional/BUILD.bazel b/absl/functional/BUILD.bazel index e861b8a56010..0a7b588e70e0 100644 --- a/absl/functional/BUILD.bazel +++ b/absl/functional/BUILD.bazel @@ -1,3 +1,19 @@ +# +# Copyright 2019 The Abseil Authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test") load( "//absl:copts/configure_copts.bzl", diff --git a/absl/hash/hash_test.cc b/absl/hash/hash_test.cc index 61f7661f5912..42c0c3d8bf7e 100644 --- a/absl/hash/hash_test.cc +++ b/absl/hash/hash_test.cc @@ -300,6 +300,33 @@ TEST(HashValueTest, Strings) { SpyHash(absl::string_view("ABC"))); } +TEST(HashValueTest, WString) { + EXPECT_TRUE((is_hashable<std::wstring>::value)); + + EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple( + std::wstring(), std::wstring(L"ABC"), std::wstring(L"ABC"), + std::wstring(L"Some other different string"), + std::wstring(L"Iñtërnâtiônàlizætiøn")))); +} + +TEST(HashValueTest, U16String) { + EXPECT_TRUE((is_hashable<std::u16string>::value)); + + EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple( + std::u16string(), std::u16string(u"ABC"), std::u16string(u"ABC"), + std::u16string(u"Some other different string"), + std::u16string(u"Iñtërnâtiônàlizætiøn")))); +} + +TEST(HashValueTest, U32String) { + EXPECT_TRUE((is_hashable<std::u32string>::value)); + + EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple( + std::u32string(), std::u32string(U"ABC"), std::u32string(U"ABC"), + std::u32string(U"Some other different string"), + std::u32string(U"Iñtërnâtiônàlizætiøn")))); +} + TEST(HashValueTest, StdArray) { EXPECT_TRUE((is_hashable<std::array<int, 3>>::value)); diff --git a/absl/hash/internal/hash.h b/absl/hash/internal/hash.h index e99f8e75bd9e..7d44f57dc90d 100644 --- a/absl/hash/internal/hash.h +++ b/absl/hash/internal/hash.h @@ -427,6 +427,19 @@ H AbslHashValue(H hash_state, absl::string_view str) { str.size()); } +// Support std::wstring, std::u16string and std::u32string. +template <typename Char, typename Alloc, typename H, + typename = absl::enable_if_t<std::is_same<Char, wchar_t>::value || + std::is_same<Char, char16_t>::value || + std::is_same<Char, char32_t>::value>> +H AbslHashValue( + H hash_state, + const std::basic_string<Char, std::char_traits<Char>, Alloc>& str) { + return H::combine( + H::combine_contiguous(std::move(hash_state), str.data(), str.size()), + str.size()); +} + // ----------------------------------------------------------------------------- // AbslHashValue for Sequence Containers // ----------------------------------------------------------------------------- diff --git a/absl/numeric/int128.h b/absl/numeric/int128.h index 10be8eca42e7..4f965686c393 100644 --- a/absl/numeric/int128.h +++ b/absl/numeric/int128.h @@ -720,9 +720,9 @@ inline uint128& uint128::operator--() { } #if defined(ABSL_HAVE_INTRINSIC_INT128) -#include "absl/numeric/int128_have_intrinsic.inc" +#include "absl/numeric/int128_have_intrinsic.inc" // IWYU pragma: export #else // ABSL_HAVE_INTRINSIC_INT128 -#include "absl/numeric/int128_no_intrinsic.inc" +#include "absl/numeric/int128_no_intrinsic.inc" // IWYU pragma: export #endif // ABSL_HAVE_INTRINSIC_INT128 } // namespace absl diff --git a/absl/random/CMakeLists.txt b/absl/random/CMakeLists.txt index 289854ffd40d..264a6f3c6abc 100644 --- a/absl/random/CMakeLists.txt +++ b/absl/random/CMakeLists.txt @@ -447,6 +447,7 @@ absl_cc_library( ${ABSL_DEFAULT_COPTS} LINKOPTS ${ABSL_DEFAULT_LINKOPTS} + $<$<BOOL:${MINGW}>:"bcrypt"> DEPS absl::core_headers absl::optional diff --git a/absl/random/internal/BUILD.bazel b/absl/random/internal/BUILD.bazel index 91388d19f3c5..cc9bc013bc90 100644 --- a/absl/random/internal/BUILD.bazel +++ b/absl/random/internal/BUILD.bazel @@ -89,7 +89,10 @@ cc_library( "seed_material.h", ], copts = ABSL_DEFAULT_COPTS, - linkopts = ABSL_DEFAULT_LINKOPTS, + linkopts = ABSL_DEFAULT_LINKOPTS + select({ + "//absl:windows": ["-DEFAULTLIB:bcrypt.lib"], + "//conditions:default": [], + }), deps = [ ":fast_uniform_bits", "//absl/base:core_headers", diff --git a/absl/random/internal/randen_hwaes.cc b/absl/random/internal/randen_hwaes.cc index 7d5b2b74128b..6cc36fd39b5e 100644 --- a/absl/random/internal/randen_hwaes.cc +++ b/absl/random/internal/randen_hwaes.cc @@ -159,13 +159,11 @@ inline ABSL_TARGET_CRYPTO Vector128 ReverseBytes(const Vector128& v) { // WARNING: these load/store in native byte order. It is OK to load and then // store an unchanged vector, but interpreting the bits as a number or input // to AES will have undefined results. -inline ABSL_TARGET_CRYPTO Vector128 -Vector128Load(const void* ABSL_RANDOM_INTERNAL_RESTRICT from) { +inline ABSL_TARGET_CRYPTO Vector128 Vector128Load(const void* from) { return vec_vsx_ld(0, reinterpret_cast<const Vector128*>(from)); } -inline ABSL_TARGET_CRYPTO void Vector128Store( - const Vector128& v, void* ABSL_RANDOM_INTERNAL_RESTRICT to) { +inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) { vec_vsx_st(v, 0, reinterpret_cast<Vector128*>(to)); } @@ -177,8 +175,7 @@ inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state, } // Enables native loads in the round loop by pre-swapping. -inline ABSL_TARGET_CRYPTO void SwapEndian( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state) { +inline ABSL_TARGET_CRYPTO void SwapEndian(uint64_t* state) { using absl::random_internal::RandenTraits; constexpr size_t kLanes = 2; constexpr size_t kFeistelBlocks = RandenTraits::kFeistelBlocks; @@ -230,13 +227,11 @@ using Vector128 = uint8x16_t; namespace { -inline ABSL_TARGET_CRYPTO Vector128 -Vector128Load(const void* ABSL_RANDOM_INTERNAL_RESTRICT from) { +inline ABSL_TARGET_CRYPTO Vector128 Vector128Load(const void* from) { return vld1q_u8(reinterpret_cast<const uint8_t*>(from)); } -inline ABSL_TARGET_CRYPTO void Vector128Store( - const Vector128& v, void* ABSL_RANDOM_INTERNAL_RESTRICT to) { +inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) { vst1q_u8(reinterpret_cast<uint8_t*>(to), v); } @@ -254,8 +249,7 @@ inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state, return vaesmcq_u8(vaeseq_u8(state, uint8x16_t{})) ^ round_key; } -inline ABSL_TARGET_CRYPTO void SwapEndian( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT) {} +inline ABSL_TARGET_CRYPTO void SwapEndian(uint64_t*) {} } // namespace @@ -283,15 +277,12 @@ class Vector128 { __m128i data_; }; -inline ABSL_TARGET_CRYPTO Vector128 -Vector128Load(const void* ABSL_RANDOM_INTERNAL_RESTRICT from) { +inline ABSL_TARGET_CRYPTO Vector128 Vector128Load(const void* from) { return Vector128(_mm_load_si128(reinterpret_cast<const __m128i*>(from))); } -inline ABSL_TARGET_CRYPTO void Vector128Store( - const Vector128& v, void* ABSL_RANDOM_INTERNAL_RESTRICT to) { - _mm_store_si128(reinterpret_cast<__m128i * ABSL_RANDOM_INTERNAL_RESTRICT>(to), - v.data()); +inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) { + _mm_store_si128(reinterpret_cast<__m128i*>(to), v.data()); } // One round of AES. "round_key" is a public constant for breaking the @@ -304,8 +295,7 @@ inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state, return Vector128(_mm_aesenc_si128(state.data(), round_key.data())); } -inline ABSL_TARGET_CRYPTO void SwapEndian( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT) {} +inline ABSL_TARGET_CRYPTO void SwapEndian(uint64_t*) {} } // namespace @@ -402,8 +392,7 @@ constexpr size_t kLanes = 2; // Block shuffles applies a shuffle to the entire state between AES rounds. // Improved odd-even shuffle from "New criterion for diffusion property". -inline ABSL_TARGET_CRYPTO void BlockShuffle( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state) { +inline ABSL_TARGET_CRYPTO void BlockShuffle(uint64_t* state) { static_assert(kFeistelBlocks == 16, "Expecting 16 FeistelBlocks."); constexpr size_t shuffle[kFeistelBlocks] = {7, 2, 13, 4, 11, 8, 3, 6, @@ -452,8 +441,7 @@ inline ABSL_TARGET_CRYPTO void BlockShuffle( // parallel hides the 7-cycle AESNI latency on HSW. Note that the Feistel // XORs are 'free' (included in the second AES instruction). inline ABSL_TARGET_CRYPTO const u64x2* FeistelRound( - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state, - const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys) { + uint64_t* state, const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys) { static_assert(kFeistelBlocks == 16, "Expecting 16 FeistelBlocks."); // MSVC does a horrible job at unrolling loops. @@ -513,8 +501,7 @@ inline ABSL_TARGET_CRYPTO const u64x2* FeistelRound( // 2^64 queries if the round function is a PRF. This is similar to the b=8 case // of Simpira v2, but more efficient than its generic construction for b=16. inline ABSL_TARGET_CRYPTO void Permute( - const void* ABSL_RANDOM_INTERNAL_RESTRICT keys, - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state) { + const void* ABSL_RANDOM_INTERNAL_RESTRICT keys, uint64_t* state) { const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys128 = static_cast<const u64x2*>(keys); @@ -544,10 +531,8 @@ const void* ABSL_TARGET_CRYPTO RandenHwAes::GetKeys() { // NOLINTNEXTLINE void ABSL_TARGET_CRYPTO RandenHwAes::Absorb(const void* seed_void, void* state_void) { - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state = - reinterpret_cast<uint64_t*>(state_void); - const uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT seed = - reinterpret_cast<const uint64_t*>(seed_void); + auto* state = static_cast<uint64_t*>(state_void); + const auto* seed = static_cast<const uint64_t*>(seed_void); constexpr size_t kCapacityBlocks = kCapacityBytes / sizeof(Vector128); constexpr size_t kStateBlocks = kStateBytes / sizeof(Vector128); @@ -623,8 +608,7 @@ void ABSL_TARGET_CRYPTO RandenHwAes::Generate(const void* keys, void* state_void) { static_assert(kCapacityBytes == sizeof(Vector128), "Capacity mismatch"); - uint64_t* ABSL_RANDOM_INTERNAL_RESTRICT state = - reinterpret_cast<uint64_t*>(state_void); + auto* state = static_cast<uint64_t*>(state_void); const Vector128 prev_inner = Vector128Load(state); diff --git a/absl/strings/internal/numbers_test_common.h b/absl/strings/internal/numbers_test_common.h index 28247205af48..a263219e27b4 100644 --- a/absl/strings/internal/numbers_test_common.h +++ b/absl/strings/internal/numbers_test_common.h @@ -42,8 +42,9 @@ inline bool Itoa(IntType value, int base, std::string* destination) { while (value != 0) { const IntType next_value = value / base; // Can't use std::abs here because of problems when IntType is unsigned. - int remainder = value > next_value * base ? value - next_value * base - : next_value * base - value; + int remainder = + static_cast<int>(value > next_value * base ? value - next_value * base + : next_value * base - value); char c = remainder < 10 ? '0' + remainder : 'A' + remainder - 10; destination->insert(0, 1, c); value = next_value; diff --git a/absl/strings/numbers.cc b/absl/strings/numbers.cc index d7b94fc1301e..4890bd54a549 100644 --- a/absl/strings/numbers.cc +++ b/absl/strings/numbers.cc @@ -93,43 +93,6 @@ bool SimpleAtod(absl::string_view str, double* out) { return true; } -namespace { - -// Writes a two-character representation of 'i' to 'buf'. 'i' must be in the -// range 0 <= i < 100, and buf must have space for two characters. Example: -// char buf[2]; -// PutTwoDigits(42, buf); -// // buf[0] == '4' -// // buf[1] == '2' -inline void PutTwoDigits(size_t i, char* buf) { - static const char two_ASCII_digits[100][2] = { - {'0', '0'}, {'0', '1'}, {'0', '2'}, {'0', '3'}, {'0', '4'}, - {'0', '5'}, {'0', '6'}, {'0', '7'}, {'0', '8'}, {'0', '9'}, - {'1', '0'}, {'1', '1'}, {'1', '2'}, {'1', '3'}, {'1', '4'}, - {'1', '5'}, {'1', '6'}, {'1', '7'}, {'1', '8'}, {'1', '9'}, - {'2', '0'}, {'2', '1'}, {'2', '2'}, {'2', '3'}, {'2', '4'}, - {'2', '5'}, {'2', '6'}, {'2', '7'}, {'2', '8'}, {'2', '9'}, - {'3', '0'}, {'3', '1'}, {'3', '2'}, {'3', '3'}, {'3', '4'}, - {'3', '5'}, {'3', '6'}, {'3', '7'}, {'3', '8'}, {'3', '9'}, - {'4', '0'}, {'4', '1'}, {'4', '2'}, {'4', '3'}, {'4', '4'}, - {'4', '5'}, {'4', '6'}, {'4', '7'}, {'4', '8'}, {'4', '9'}, - {'5', '0'}, {'5', '1'}, {'5', '2'}, {'5', '3'}, {'5', '4'}, - {'5', '5'}, {'5', '6'}, {'5', '7'}, {'5', '8'}, {'5', '9'}, - {'6', '0'}, {'6', '1'}, {'6', '2'}, {'6', '3'}, {'6', '4'}, - {'6', '5'}, {'6', '6'}, {'6', '7'}, {'6', '8'}, {'6', '9'}, - {'7', '0'}, {'7', '1'}, {'7', '2'}, {'7', '3'}, {'7', '4'}, - {'7', '5'}, {'7', '6'}, {'7', '7'}, {'7', '8'}, {'7', '9'}, - {'8', '0'}, {'8', '1'}, {'8', '2'}, {'8', '3'}, {'8', '4'}, - {'8', '5'}, {'8', '6'}, {'8', '7'}, {'8', '8'}, {'8', '9'}, - {'9', '0'}, {'9', '1'}, {'9', '2'}, {'9', '3'}, {'9', '4'}, - {'9', '5'}, {'9', '6'}, {'9', '7'}, {'9', '8'}, {'9', '9'} - }; - assert(i < 100); - memcpy(buf, two_ASCII_digits[i], 2); -} - -} // namespace - bool SimpleAtob(absl::string_view str, bool* out) { ABSL_RAW_CHECK(out != nullptr, "Output pointer must not be nullptr."); if (EqualsIgnoreCase(str, "true") || EqualsIgnoreCase(str, "t") || @@ -496,13 +459,13 @@ static ExpDigits SplitToSix(const double value) { int two_digits = dddddd / 10000; dddddd -= two_digits * 10000; - PutTwoDigits(two_digits, &exp_dig.digits[0]); + numbers_internal::PutTwoDigits(two_digits, &exp_dig.digits[0]); two_digits = dddddd / 100; dddddd -= two_digits * 100; - PutTwoDigits(two_digits, &exp_dig.digits[2]); + numbers_internal::PutTwoDigits(two_digits, &exp_dig.digits[2]); - PutTwoDigits(dddddd, &exp_dig.digits[4]); + numbers_internal::PutTwoDigits(dddddd, &exp_dig.digits[4]); return exp_dig; } @@ -908,6 +871,25 @@ ABSL_CONST_INIT const char kHexTable[513] = "e0e1e2e3e4e5e6e7e8e9eaebecedeeef" "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff"; +ABSL_CONST_INIT const char two_ASCII_digits[100][2] = { + {'0', '0'}, {'0', '1'}, {'0', '2'}, {'0', '3'}, {'0', '4'}, {'0', '5'}, + {'0', '6'}, {'0', '7'}, {'0', '8'}, {'0', '9'}, {'1', '0'}, {'1', '1'}, + {'1', '2'}, {'1', '3'}, {'1', '4'}, {'1', '5'}, {'1', '6'}, {'1', '7'}, + {'1', '8'}, {'1', '9'}, {'2', '0'}, {'2', '1'}, {'2', '2'}, {'2', '3'}, + {'2', '4'}, {'2', '5'}, {'2', '6'}, {'2', '7'}, {'2', '8'}, {'2', '9'}, + {'3', '0'}, {'3', '1'}, {'3', '2'}, {'3', '3'}, {'3', '4'}, {'3', '5'}, + {'3', '6'}, {'3', '7'}, {'3', '8'}, {'3', '9'}, {'4', '0'}, {'4', '1'}, + {'4', '2'}, {'4', '3'}, {'4', '4'}, {'4', '5'}, {'4', '6'}, {'4', '7'}, + {'4', '8'}, {'4', '9'}, {'5', '0'}, {'5', '1'}, {'5', '2'}, {'5', '3'}, + {'5', '4'}, {'5', '5'}, {'5', '6'}, {'5', '7'}, {'5', '8'}, {'5', '9'}, + {'6', '0'}, {'6', '1'}, {'6', '2'}, {'6', '3'}, {'6', '4'}, {'6', '5'}, + {'6', '6'}, {'6', '7'}, {'6', '8'}, {'6', '9'}, {'7', '0'}, {'7', '1'}, + {'7', '2'}, {'7', '3'}, {'7', '4'}, {'7', '5'}, {'7', '6'}, {'7', '7'}, + {'7', '8'}, {'7', '9'}, {'8', '0'}, {'8', '1'}, {'8', '2'}, {'8', '3'}, + {'8', '4'}, {'8', '5'}, {'8', '6'}, {'8', '7'}, {'8', '8'}, {'8', '9'}, + {'9', '0'}, {'9', '1'}, {'9', '2'}, {'9', '3'}, {'9', '4'}, {'9', '5'}, + {'9', '6'}, {'9', '7'}, {'9', '8'}, {'9', '9'}}; + bool safe_strto32_base(absl::string_view text, int32_t* value, int base) { return safe_int_internal<int32_t>(text, value, base); } @@ -924,5 +906,9 @@ bool safe_strtou64_base(absl::string_view text, uint64_t* value, int base) { return safe_uint_internal<uint64_t>(text, value, base); } +bool safe_strtou128_base(absl::string_view text, uint128* value, int base) { + return safe_uint_internal<absl::uint128>(text, value, base); +} + } // namespace numbers_internal } // namespace absl diff --git a/absl/strings/numbers.h b/absl/strings/numbers.h index 9b8ec89a8941..5e15ca40b736 100644 --- a/absl/strings/numbers.h +++ b/absl/strings/numbers.h @@ -67,7 +67,7 @@ ABSL_MUST_USE_RESULT bool SimpleAtoi(absl::string_view str, int_type* out); // Converts the given string (optionally followed or preceded by ASCII // whitespace) into a float, which may be rounded on overflow or underflow. // See https://en.cppreference.com/w/c/string/byte/strtof for details about the -// allowed formats for `str`, except SimpleAtof() is locale-indepdent and will +// allowed formats for `str`, except SimpleAtof() is locale-independent and will // always use the "C" locale. If any errors are encountered, this function // returns `false`, leaving `out` in an unspecified state. ABSL_MUST_USE_RESULT bool SimpleAtof(absl::string_view str, float* out); @@ -102,12 +102,26 @@ namespace numbers_internal { // Digit conversion. extern const char kHexChar[17]; // 0123456789abcdef extern const char kHexTable[513]; // 000102030405060708090a0b0c0d0e0f1011... +extern const char two_ASCII_digits[100][2]; // 00, 01, 02, 03... + +// Writes a two-character representation of 'i' to 'buf'. 'i' must be in the +// range 0 <= i < 100, and buf must have space for two characters. Example: +// char buf[2]; +// PutTwoDigits(42, buf); +// // buf[0] == '4' +// // buf[1] == '2' +inline void PutTwoDigits(size_t i, char* buf) { + assert(i < 100); + memcpy(buf, two_ASCII_digits[i], 2); +} // safe_strto?() functions for implementing SimpleAtoi() bool safe_strto32_base(absl::string_view text, int32_t* value, int base); bool safe_strto64_base(absl::string_view text, int64_t* value, int base); bool safe_strtou32_base(absl::string_view text, uint32_t* value, int base); bool safe_strtou64_base(absl::string_view text, uint64_t* value, int base); +bool safe_strtou128_base(absl::string_view text, absl::uint128* value, + int base); static const int kFastToBufferSize = 32; static const int kSixDigitsToBufferSize = 16; @@ -232,6 +246,11 @@ ABSL_MUST_USE_RESULT bool SimpleAtoi(absl::string_view str, int_type* out) { return numbers_internal::safe_strtoi_base(str, out, 10); } +ABSL_MUST_USE_RESULT inline bool SimpleAtoi(absl::string_view str, + absl::uint128* out) { + return numbers_internal::safe_strtou128_base(str, out, 10); +} + } // namespace absl #endif // ABSL_STRINGS_NUMBERS_H_ diff --git a/absl/strings/numbers_test.cc b/absl/strings/numbers_test.cc index b92b9a8cb2a8..68229b15a4e2 100644 --- a/absl/strings/numbers_test.cc +++ b/absl/strings/numbers_test.cc @@ -249,7 +249,9 @@ TEST(Numbers, TestFastPrints) { template <typename int_type, typename in_val_type> void VerifySimpleAtoiGood(in_val_type in_value, int_type exp_value) { - std::string s = absl::StrCat(in_value); + std::string s; + // uint128 can be streamed but not StrCat'd + absl::strings_internal::OStringStream(&s) << in_value; int_type x = static_cast<int_type>(~exp_value); EXPECT_TRUE(SimpleAtoi(s, &x)) << "in_value=" << in_value << " s=" << s << " x=" << x; @@ -325,6 +327,25 @@ TEST(NumbersTest, Atoi) { VerifySimpleAtoiGood<uint64_t>(std::numeric_limits<uint64_t>::max(), std::numeric_limits<uint64_t>::max()); + // SimpleAtoi(absl::string_view, absl::uint128) + VerifySimpleAtoiGood<absl::uint128>(0, 0); + VerifySimpleAtoiGood<absl::uint128>(42, 42); + VerifySimpleAtoiBad<absl::uint128>(-42); + + VerifySimpleAtoiBad<absl::uint128>(std::numeric_limits<int32_t>::min()); + VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<int32_t>::max(), + std::numeric_limits<int32_t>::max()); + VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<uint32_t>::max(), + std::numeric_limits<uint32_t>::max()); + VerifySimpleAtoiBad<absl::uint128>(std::numeric_limits<int64_t>::min()); + VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<int64_t>::max(), + std::numeric_limits<int64_t>::max()); + VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<uint64_t>::max(), + std::numeric_limits<uint64_t>::max()); + VerifySimpleAtoiGood<absl::uint128>( + std::numeric_limits<absl::uint128>::max(), + std::numeric_limits<absl::uint128>::max()); + // Some other types VerifySimpleAtoiGood<int>(-42, -42); VerifySimpleAtoiGood<int32_t>(-42, -42); @@ -657,6 +678,46 @@ TEST(stringtest, safe_strtou32_random) { TEST(stringtest, safe_strtou64_random) { test_random_integer_parse_base<uint64_t>(&safe_strtou64_base); } +TEST(stringtest, safe_strtou128_random) { + // random number generators don't work for uint128, and + // uint128 can be streamed but not StrCat'd, so this code must be custom + // implemented for uint128, but is generally the same as what's above. + // test_random_integer_parse_base<absl::uint128>( + // &absl::numbers_internal::safe_strtou128_base); + using RandomEngine = std::minstd_rand0; + using IntType = absl::uint128; + constexpr auto parse_func = &absl::numbers_internal::safe_strtou128_base; + + std::random_device rd; + RandomEngine rng(rd()); + std::uniform_int_distribution<uint64_t> random_uint64( + std::numeric_limits<uint64_t>::min()); + std::uniform_int_distribution<int> random_base(2, 35); + + for (size_t i = 0; i < kNumRandomTests; i++) { + IntType value = random_uint64(rng); + value = (value << 64) + random_uint64(rng); + int base = random_base(rng); + std::string str_value; + EXPECT_TRUE(Itoa<IntType>(value, base, &str_value)); + IntType parsed_value; + + // Test successful parse + EXPECT_TRUE(parse_func(str_value, &parsed_value, base)); + EXPECT_EQ(parsed_value, value); + + // Test overflow + std::string s; + absl::strings_internal::OStringStream(&s) + << std::numeric_limits<IntType>::max() << value; + EXPECT_FALSE(parse_func(s, &parsed_value, base)); + + // Test underflow + s.clear(); + absl::strings_internal::OStringStream(&s) << "-" << value; + EXPECT_FALSE(parse_func(s, &parsed_value, base)); + } +} TEST(stringtest, safe_strtou32_base) { for (int i = 0; strtouint32_test_cases()[i].str != nullptr; ++i) { diff --git a/absl/synchronization/internal/waiter.cc b/absl/synchronization/internal/waiter.cc index 8e7137705325..f1425872e5b6 100644 --- a/absl/synchronization/internal/waiter.cc +++ b/absl/synchronization/internal/waiter.cc @@ -342,8 +342,11 @@ bool Waiter::Wait(KernelTimeout t) { } void Waiter::Post() { - wakeups_.fetch_add(1, std::memory_order_release); // Post a wakeup. - Poke(); + // Post a wakeup. + if (wakeups_.fetch_add(1, std::memory_order_release) == 0) { + // We incremented from 0, need to wake a potential waiter. + Poke(); + } } void Waiter::Poke() { diff --git a/absl/synchronization/internal/waiter.h b/absl/synchronization/internal/waiter.h index cac81d5fd226..9540598be5d3 100644 --- a/absl/synchronization/internal/waiter.h +++ b/absl/synchronization/internal/waiter.h @@ -24,6 +24,10 @@ #include <pthread.h> #endif +#ifdef __linux__ +#include <linux/futex.h> +#endif + #ifdef ABSL_HAVE_SEMAPHORE_H #include <semaphore.h> #endif @@ -44,7 +48,12 @@ #define ABSL_WAITER_MODE ABSL_FORCE_WAITER_MODE #elif defined(_WIN32) && _WIN32_WINNT >= _WIN32_WINNT_VISTA #define ABSL_WAITER_MODE ABSL_WAITER_MODE_WIN32 -#elif defined(__linux__) +#elif defined(__BIONIC__) +// Bionic supports all the futex operations we need even when some of the futex +// definitions are missing. +#define ABSL_WAITER_MODE ABSL_WAITER_MODE_FUTEX +#elif defined(__linux__) && defined(FUTEX_CLOCK_REALTIME) +// FUTEX_CLOCK_REALTIME requires Linux >= 2.6.28. #define ABSL_WAITER_MODE ABSL_WAITER_MODE_FUTEX #elif defined(ABSL_HAVE_SEMAPHORE_H) #define ABSL_WAITER_MODE ABSL_WAITER_MODE_SEM |