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https://github.com/git-for-windows/git.git
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ff557c59ef
When asking the mingw-w64 variant of GCC to compile C11 code, it seems to link implicitly to libwinpthread, which does implement a pthread emulation (that is more complete than Git's). In preparation for vendoring in mimalloc (which requires C11 support), let's keep preferring Git's own pthread emulation. To avoid linker errors where it thinks that the `pthread_self` and the `pthread_create` symbols are defined twice, let's give our version a `win32_` prefix, just like we already do for `pthread_join()`. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
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* Header used to adapt pthread-based POSIX code to Windows API threads.
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*
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* Copyright (C) 2009 Andrzej K. Haczewski <ahaczewski@gmail.com>
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*/
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#ifndef PTHREAD_H
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#define PTHREAD_H
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h>
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/*
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* Defines that adapt Windows API threads to pthreads API
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*/
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#define pthread_mutex_t CRITICAL_SECTION
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static inline int return_0(int i UNUSED) {
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return 0;
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}
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#define pthread_mutex_init(a,b) return_0((InitializeCriticalSection((a)), 0))
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#define pthread_mutex_destroy(a) DeleteCriticalSection((a))
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#define pthread_mutex_lock EnterCriticalSection
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#define pthread_mutex_unlock LeaveCriticalSection
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typedef int pthread_mutexattr_t;
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#define pthread_mutexattr_init(a) (*(a) = 0)
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#define pthread_mutexattr_destroy(a) do {} while (0)
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#define pthread_mutexattr_settype(a, t) 0
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#define PTHREAD_MUTEX_RECURSIVE 0
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#define pthread_cond_t CONDITION_VARIABLE
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#define pthread_cond_init(a,b) InitializeConditionVariable((a))
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#define pthread_cond_destroy(a) do {} while (0)
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#define pthread_cond_wait(a,b) return_0(SleepConditionVariableCS((a), (b), INFINITE))
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#define pthread_cond_signal WakeConditionVariable
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#define pthread_cond_broadcast WakeAllConditionVariable
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/*
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* Simple thread creation implementation using pthread API
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*/
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typedef struct {
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HANDLE handle;
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void *(*start_routine)(void*);
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void *arg;
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DWORD tid;
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} pthread_t;
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int win32_pthread_create(pthread_t *thread, const void *unused,
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void *(*start_routine)(void*), void *arg);
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#define pthread_create win32_pthread_create
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/*
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* To avoid the need of copying a struct, we use small macro wrapper to pass
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* pointer to win32_pthread_join instead.
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*/
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#define pthread_join(a, b) win32_pthread_join(&(a), (b))
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int win32_pthread_join(pthread_t *thread, void **value_ptr);
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#define pthread_equal(t1, t2) ((t1).tid == (t2).tid)
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pthread_t win32_pthread_self(void);
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#define pthread_self win32_pthread_self
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static inline void NORETURN pthread_exit(void *ret)
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{
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_endthreadex((unsigned)(uintptr_t)ret);
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}
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typedef DWORD pthread_key_t;
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static inline int pthread_key_create(pthread_key_t *keyp, void (*destructor)(void *value) UNUSED)
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{
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return (*keyp = TlsAlloc()) == TLS_OUT_OF_INDEXES ? EAGAIN : 0;
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}
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static inline int pthread_key_delete(pthread_key_t key)
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{
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return TlsFree(key) ? 0 : EINVAL;
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}
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static inline int pthread_setspecific(pthread_key_t key, const void *value)
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{
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return TlsSetValue(key, (void *)value) ? 0 : EINVAL;
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}
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static inline void *pthread_getspecific(pthread_key_t key)
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{
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return TlsGetValue(key);
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}
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#ifndef __MINGW64_VERSION_MAJOR
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static inline int pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
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{
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return 0;
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}
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#endif
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#endif /* PTHREAD_H */
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