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9374919442
The mutex used to protect object access (read_mutex) may need to be
acquired recursively. Introduce init_recursive_mutex() helper function
in thread-utils.c that constructs a mutex with the PHREAD_MUTEX_RECURSIVE
attribute.
pthread_mutex_init() emulation on Win32 is already recursive as it is
implemented on top of the CRITICAL_SECTION type, which is recursive.
http://msdn.microsoft.com/en-us/library/ms682530%28VS.85%29.aspx
Add do-nothing compatibility wrappers for pthread_mutexattr* functions.
Initial-version-by: Fredrik Kuivinen <frekui@gmail.com>
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
75 lines
2.1 KiB
C
75 lines
2.1 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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#define pthread_mutex_init(a,b) (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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/*
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* Implement simple condition variable for Windows threads, based on ACE
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* implementation.
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*
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* See original implementation: http://bit.ly/1vkDjo
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* ACE homepage: http://www.cse.wustl.edu/~schmidt/ACE.html
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* See also: http://www.cse.wustl.edu/~schmidt/win32-cv-1.html
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*/
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typedef struct {
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LONG waiters;
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int was_broadcast;
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CRITICAL_SECTION waiters_lock;
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HANDLE sema;
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HANDLE continue_broadcast;
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} pthread_cond_t;
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extern int pthread_cond_init(pthread_cond_t *cond, const void *unused);
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extern int pthread_cond_destroy(pthread_cond_t *cond);
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extern int pthread_cond_wait(pthread_cond_t *cond, CRITICAL_SECTION *mutex);
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extern int pthread_cond_signal(pthread_cond_t *cond);
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extern int pthread_cond_broadcast(pthread_cond_t *cond);
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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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} pthread_t;
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extern int pthread_create(pthread_t *thread, const void *unused,
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void *(*start_routine)(void*), void *arg);
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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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extern int win32_pthread_join(pthread_t *thread, void **value_ptr);
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#endif /* PTHREAD_H */
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