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authorVincent Ambo <mail@tazj.in>2020-11-21T18·20+0100
committerVincent Ambo <mail@tazj.in>2020-11-21T18·45+0100
commitf4609b896fac842433bd495c166d5987852a6a73 (patch)
tree95511c465c54c4f5d27e5d39ce187e2a1dd82bd3 /third_party/git/compat/poll
parent082c006c04343a78d87b6c6ab3608c25d6213c3f (diff)
merge(3p/git): Merge git subtree at v2.29.2 r/1890
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
Diffstat (limited to 'third_party/git/compat/poll')
-rw-r--r--third_party/git/compat/poll/poll.c31
1 files changed, 3 insertions, 28 deletions
diff --git a/third_party/git/compat/poll/poll.c b/third_party/git/compat/poll/poll.c
index 0e95dd493c94..afa6d245846a 100644
--- a/third_party/git/compat/poll/poll.c
+++ b/third_party/git/compat/poll/poll.c
@@ -139,22 +139,10 @@ win32_compute_revents (HANDLE h, int *p_sought)
   INPUT_RECORD *irbuffer;
   DWORD avail, nbuffer;
   BOOL bRet;
-  IO_STATUS_BLOCK iosb;
-  FILE_PIPE_LOCAL_INFORMATION fpli;
-  static PNtQueryInformationFile NtQueryInformationFile;
-  static BOOL once_only;
 
   switch (GetFileType (h))
     {
     case FILE_TYPE_PIPE:
-      if (!once_only)
-	{
-	  NtQueryInformationFile = (PNtQueryInformationFile)(void (*)(void))
-	    GetProcAddress (GetModuleHandleW (L"ntdll.dll"),
-			    "NtQueryInformationFile");
-	  once_only = TRUE;
-	}
-
       happened = 0;
       if (PeekNamedPipe (h, NULL, 0, NULL, &avail, NULL) != 0)
 	{
@@ -166,22 +154,9 @@ win32_compute_revents (HANDLE h, int *p_sought)
 
       else
 	{
-	  /* It was the write-end of the pipe.  Check if it is writable.
-	     If NtQueryInformationFile fails, optimistically assume the pipe is
-	     writable.  This could happen on Win9x, where NtQueryInformationFile
-	     is not available, or if we inherit a pipe that doesn't permit
-	     FILE_READ_ATTRIBUTES access on the write end (I think this should
-	     not happen since WinXP SP2; WINE seems fine too).  Otherwise,
-	     ensure that enough space is available for atomic writes.  */
-	  memset (&iosb, 0, sizeof (iosb));
-	  memset (&fpli, 0, sizeof (fpli));
-
-	  if (!NtQueryInformationFile
-	      || NtQueryInformationFile (h, &iosb, &fpli, sizeof (fpli),
-					 FilePipeLocalInformation)
-	      || fpli.WriteQuotaAvailable >= PIPE_BUF
-	      || (fpli.OutboundQuota < PIPE_BUF &&
-		  fpli.WriteQuotaAvailable == fpli.OutboundQuota))
+	  /* It was the write-end of the pipe. Unfortunately there is no
+	     reliable way of knowing if it can be written without blocking.
+	     Just say that it's all good. */
 	    happened |= *p_sought & (POLLOUT | POLLWRNORM | POLLWRBAND);
 	}
       return happened;