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/*
 * Copyright (C) 2009-2011 the libgit2 contributors
 *
 * 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 GIT_UNUSED(attr),
                   void *(*start_routine)(void*), void *GIT_RESTRICT arg)
{
	GIT_UNUSED_ARG(attr);
	*thread = (pthread_t) CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)start_routine, arg, 0, NULL);
	return *thread ? GIT_SUCCESS : git__throw(GIT_EOSERR, "Failed to create pthread");
}

int pthread_join(pthread_t thread, void **value_ptr)
{
    int ret;
    ret = WaitForSingleObject(thread, INFINITE);
    if (ret && value_ptr)
        GetExitCodeThread(thread, (void*) value_ptr);
    return -(!!ret);
}

int pthread_mutex_init(pthread_mutex_t *GIT_RESTRICT mutex,
                       const pthread_mutexattr_t *GIT_RESTRICT GIT_UNUSED(mutexattr))
{
    GIT_UNUSED_ARG(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_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;
}