thodg/libgit2/src/unix/pthread.h

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• Hash : 82f15896
  Author :
  Date : 2016-11-18T07:19:22
  

  threads: introduce `git_thread_exit` Introduce `git_thread_exit`, which will allow threads to terminate at an arbitrary time, returning a `void *`. On Windows, this means that we need to store the current `git_thread` in TLS, so that we can set its `return` value when terminating. We cannot simply use `ExitThread`, since Win32 returns `DWORD`s from threads; we return `void *`.

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• src/unix/pthread.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #ifndef INCLUDE_unix_pthread_h__
  #define INCLUDE_unix_pthread_h__
  
  typedef struct {
  	pthread_t thread;
  } git_thread;
  
  #define git_threads_init() (void)0
  #define git_thread_create(git_thread_ptr, start_routine, arg) \
  	pthread_create(&(git_thread_ptr)->thread, NULL, start_routine, arg)
  #define git_thread_join(git_thread_ptr, status) \
  	pthread_join((git_thread_ptr)->thread, status)
  #define git_thread_currentid() ((size_t)(pthread_self()))
  #define git_thread_exit(retval) pthread_exit(retval)
  
  /* Git Mutex */
  #define git_mutex pthread_mutex_t
  #define git_mutex_init(a)	pthread_mutex_init(a, NULL)
  #define git_mutex_lock(a)	pthread_mutex_lock(a)
  #define git_mutex_unlock(a)     pthread_mutex_unlock(a)
  #define git_mutex_free(a)	pthread_mutex_destroy(a)
  
  /* Git condition vars */
  #define git_cond pthread_cond_t
  #define git_cond_init(c)	pthread_cond_init(c, NULL)
  #define git_cond_free(c) 	pthread_cond_destroy(c)
  #define git_cond_wait(c, l)	pthread_cond_wait(c, l)
  #define git_cond_signal(c)	pthread_cond_signal(c)
  #define git_cond_broadcast(c)	pthread_cond_broadcast(c)
  
  /* Pthread (-ish) rwlock
   *
   * This differs from normal pthreads rwlocks in two ways:
   * 1. Separate APIs for releasing read locks and write locks (as
   *    opposed to the pure POSIX API which only has one unlock fn)
   * 2. You should not use recursive read locks (i.e. grabbing a read
   *    lock in a thread that already holds a read lock) because the
   *    Windows implementation doesn't support it
   */
  #define git_rwlock              pthread_rwlock_t
  #define git_rwlock_init(a)	pthread_rwlock_init(a, NULL)
  #define git_rwlock_rdlock(a)	pthread_rwlock_rdlock(a)
  #define git_rwlock_rdunlock(a)	pthread_rwlock_unlock(a)
  #define git_rwlock_wrlock(a)	pthread_rwlock_wrlock(a)
  #define git_rwlock_wrunlock(a)	pthread_rwlock_unlock(a)
  #define git_rwlock_free(a)	pthread_rwlock_destroy(a)
  #define GIT_RWLOCK_STATIC_INIT	PTHREAD_RWLOCK_INITIALIZER
  
  #endif /* INCLUDE_unix_pthread_h__ */
  

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