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/*
* Code for simulating pthreads API on Windows. This is Git-specific,
* but it is enough for Numexpr needs too.
*
* Copyright (C) 2009 Andrzej K. Haczewski <ahaczewski@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* 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.
*/
#ifndef PTHREAD_H
#define PTHREAD_H
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Defines that adapt Windows API threads to pthreads API
*/
#define pthread_mutex_t CRITICAL_SECTION
#define pthread_mutex_init(a,b) InitializeCriticalSection((a))
#define pthread_mutex_destroy(a) DeleteCriticalSection((a))
#define pthread_mutex_lock EnterCriticalSection
#define pthread_mutex_unlock LeaveCriticalSection
/*
* Implement simple condition variable for Windows threads, based on ACE
* implementation.
*
* See original implementation: http://bit.ly/1vkDjo
* ACE homepage: http://www.cse.wustl.edu/~schmidt/ACE.html
* See also: http://www.cse.wustl.edu/~schmidt/win32-cv-1.html
*/
typedef struct {
LONG waiters;
int was_broadcast;
CRITICAL_SECTION waiters_lock;
HANDLE sema;
HANDLE continue_broadcast;
} pthread_cond_t;
extern int pthread_cond_init(pthread_cond_t *cond, const void *unused);
extern int pthread_cond_destroy(pthread_cond_t *cond);
extern int pthread_cond_wait(pthread_cond_t *cond, CRITICAL_SECTION *mutex);
extern int pthread_cond_signal(pthread_cond_t *cond);
extern int pthread_cond_broadcast(pthread_cond_t *cond);
/*
* Simple thread creation implementation using pthread API
*/
typedef struct {
HANDLE handle;
void *(*start_routine)(void*);
void *arg;
} pthread_t;
extern int pthread_create(pthread_t *thread, const void *unused,
void *(*start_routine)(void*), void *arg);
/*
* To avoid the need of copying a struct, we use small macro wrapper to pass
* pointer to win32_pthread_join instead.
*/
#define pthread_join(a, b) win32_pthread_join(&(a), (b))
extern int win32_pthread_join(pthread_t *thread, void **value_ptr);
/*
* The POSIX signal system has a more developed interface than what's in
* Windows. We create a no-op shim layer to proivde enough of the API to
* pretend to support what's used when creating threads on POSIX systems.
*/
typedef int sigset_t;
enum sigop {
SIG_BLOCK,
SIG_UNBLOCK,
SIG_SETMASK
};
static inline int sigemptyset(sigset_t *sigs) { return 0; }
static inline int sigfillset(sigset_t *sigs) { return 0; }
static inline int sigaddset(sigset_t *sigs, int sig) { return 0; }
static inline int sigdelset(sigset_t *sigs, int sig) { return 0; }
static inline int pthread_sigmask(int how, sigset_t *newmask,
sigset_t *oldmask) { return 0; }
#ifdef __cplusplus
} // extern "C"
#endif
#endif /* PTHREAD_H */
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