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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "pthread.h"
int pthread_create(
pthread_t *GIT_RESTRICT thread,
const pthread_attr_t *GIT_RESTRICT attr,
void *(*start_routine)(void*),
void *GIT_RESTRICT arg)
{
GIT_UNUSED(attr);
*thread = CreateThread(
NULL, 0, (LPTHREAD_START_ROUTINE)start_routine, arg, 0, NULL);
return *thread ? 0 : -1;
}
int pthread_join(pthread_t thread, void **value_ptr)
{
DWORD ret = WaitForSingleObject(thread, INFINITE);
if (ret == WAIT_OBJECT_0) {
if (value_ptr != NULL) {
*value_ptr = NULL;
GetExitCodeThread(thread, (void *)value_ptr);
}
CloseHandle(thread);
return 0;
}
return -1;
}
int pthread_mutex_init(
pthread_mutex_t *GIT_RESTRICT mutex,
const pthread_mutexattr_t *GIT_RESTRICT mutexattr)
{
GIT_UNUSED(mutexattr);
InitializeCriticalSection(mutex);
return 0;
}
int pthread_mutex_destroy(pthread_mutex_t *mutex)
{
DeleteCriticalSection(mutex);
return 0;
}
int pthread_mutex_lock(pthread_mutex_t *mutex)
{
EnterCriticalSection(mutex);
return 0;
}
int pthread_mutex_unlock(pthread_mutex_t *mutex)
{
LeaveCriticalSection(mutex);
return 0;
}
int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
{
/* We don't support non-default attributes. */
if (attr)
return EINVAL;
/* This is an auto-reset event. */
*cond = CreateEventW(NULL, FALSE, FALSE, NULL);
assert(*cond);
/* If we can't create the event, claim that the reason was out-of-memory.
* The actual reason can be fetched with GetLastError(). */
return *cond ? 0 : ENOMEM;
}
int pthread_cond_destroy(pthread_cond_t *cond)
{
BOOL closed;
if (!cond)
return EINVAL;
closed = CloseHandle(*cond);
assert(closed);
GIT_UNUSED(closed);
*cond = NULL;
return 0;
}
int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
{
int error;
DWORD wait_result;
if (!cond || !mutex)
return EINVAL;
/* The caller must be holding the mutex. */
error = pthread_mutex_unlock(mutex);
if (error)
return error;
wait_result = WaitForSingleObject(*cond, INFINITE);
assert(WAIT_OBJECT_0 == wait_result);
GIT_UNUSED(wait_result);
return pthread_mutex_lock(mutex);
}
int pthread_cond_signal(pthread_cond_t *cond)
{
BOOL signaled;
if (!cond)
return EINVAL;
signaled = SetEvent(*cond);
assert(signaled);
GIT_UNUSED(signaled);
return 0;
}
/* pthread_cond_broadcast is not implemented because doing so with just Win32 events
* is quite complicated, and no caller in libgit2 uses it yet. */
int pthread_num_processors_np(void)
{
DWORD_PTR p, s;
int n = 0;
if (GetProcessAffinityMask(GetCurrentProcess(), &p, &s))
for (; p; p >>= 1)
n += p&1;
return n ? n : 1;
}
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