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/*
* Copyright (C) 2009 Andrzej K. Haczewski <ahaczewski@gmail.com>
*
* DISCLAIMER: The implementation is Git-specific, it is subset of original
* Pthreads API, without lots of other features that Git doesn't use.
* Git also makes sure that the passed arguments are valid, so there's
* no need for double-checking.
*/
#include "../../git-compat-util.h"
#include "pthread.h"
#include <errno.h>
#include <limits.h>
static unsigned __stdcall win32_start_routine(void *arg)
{
pthread_t *thread = arg;
thread->tid = GetCurrentThreadId();
thread->arg = thread->start_routine(thread->arg);
return 0;
}
int pthread_create(pthread_t *thread, const void *attr UNUSED,
void *(*start_routine)(void *), void *arg)
{
thread->arg = arg;
thread->start_routine = start_routine;
thread->handle = (HANDLE)_beginthreadex(NULL, 0, win32_start_routine,
thread, 0, NULL);
if (!thread->handle)
return errno;
else
return 0;
}
int win32_pthread_join(pthread_t *thread, void **value_ptr)
{
DWORD result = WaitForSingleObject(thread->handle, INFINITE);
switch (result) {
case WAIT_OBJECT_0:
if (value_ptr)
*value_ptr = thread->arg;
CloseHandle(thread->handle);
return 0;
case WAIT_ABANDONED:
CloseHandle(thread->handle);
return EINVAL;
default:
/* the wait failed, so do not detach */
return err_win_to_posix(GetLastError());
}
}
pthread_t pthread_self(void)
{
pthread_t t = { NULL };
t.tid = GetCurrentThreadId();
return t;
}
int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
{
if (SleepConditionVariableCS(cond, mutex, INFINITE) == 0)
return err_win_to_posix(GetLastError());
return 0;
}
int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
const struct timespec *abstime)
{
struct timeval now;
long long now_ms, deadline_ms;
DWORD timeout_ms;
gettimeofday(&now, NULL);
now_ms = (long long)now.tv_sec * 1000 + now.tv_usec / 1000;
deadline_ms = (long long)abstime->tv_sec * 1000 +
abstime->tv_nsec / 1000000;
if (deadline_ms <= now_ms)
return ETIMEDOUT;
else
timeout_ms = (DWORD)(deadline_ms - now_ms);
if (SleepConditionVariableCS(cond, mutex, timeout_ms) == 0) {
DWORD err = GetLastError();
if (err == ERROR_TIMEOUT)
return ETIMEDOUT;
return err_win_to_posix(err);
}
return 0;
}
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