1 files changed, 57 insertions, 0 deletions
diff --git a/thread-utils.h b/thread-utils.h
new file mode 100644
index 000000000000..4961487ed914
--- /dev/null
+++ b/thread-utils.h
@@ -0,0 +1,57 @@
+#ifndef THREAD_COMPAT_H
+#define THREAD_COMPAT_H
+
+#ifndef NO_PTHREADS
+#include <pthread.h>
+
+#define HAVE_THREADS 1
+
+#else
+
+#define HAVE_THREADS 0
+
+/*
+ * macros instead of typedefs because pthread definitions may have
+ * been pulled in by some system dependencies even though the user
+ * wants to disable pthread.
+ */
+#define pthread_t int
+#define pthread_mutex_t int
+#define pthread_cond_t int
+#define pthread_key_t int
+
+#define pthread_mutex_init(mutex, attr) dummy_pthread_init(mutex)
+#define pthread_mutex_lock(mutex)
+#define pthread_mutex_unlock(mutex)
+#define pthread_mutex_destroy(mutex)
+
+#define pthread_cond_init(cond, attr) dummy_pthread_init(cond)
+#define pthread_cond_wait(cond, mutex)
+#define pthread_cond_signal(cond)
+#define pthread_cond_broadcast(cond)
+#define pthread_cond_destroy(cond)
+
+#define pthread_key_create(key, attr) dummy_pthread_init(key)
+#define pthread_key_delete(key)
+
+#define pthread_create(thread, attr, fn, data) \
+	dummy_pthread_create(thread, attr, fn, data)
+#define pthread_join(thread, retval) \
+	dummy_pthread_join(thread, retval)
+
+#define pthread_setspecific(key, data)
+#define pthread_getspecific(key) NULL
+
+int dummy_pthread_create(pthread_t *pthread, const void *attr,
+			 void *(*fn)(void *), void *data);
+int dummy_pthread_join(pthread_t pthread, void **retval);
+
+int dummy_pthread_init(void *);
+
+#endif
+
+int online_cpus(void);
+int init_recursive_mutex(pthread_mutex_t*);
+
+
+#endif /* THREAD_COMPAT_H */