| /* Threads compatibility routines for libgcc2 and libobjc. */ |
| /* Compile this one with gcc. */ |
| /* Copyright (C) 1997, 1999, 2000, 2004 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 2, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to the Free |
| Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| /* As a special exception, if you link this library with other files, |
| some of which are compiled with GCC, to produce an executable, |
| this library does not by itself cause the resulting executable |
| to be covered by the GNU General Public License. |
| This exception does not however invalidate any other reasons why |
| the executable file might be covered by the GNU General Public License. */ |
| |
| #ifndef GCC_GTHR_SINGLE_H |
| #define GCC_GTHR_SINGLE_H |
| |
| /* Just provide compatibility for mutex handling. */ |
| |
| typedef int __gthread_mutex_t; |
| typedef int __gthread_recursive_mutex_t; |
| |
| #define __GTHREAD_MUTEX_INIT 0 |
| |
| #ifdef __cplusplus |
| #define UNUSED(x) |
| #else |
| #define UNUSED(x) x __attribute__((unused)) |
| #endif |
| |
| #ifdef _LIBOBJC |
| |
| /* Thread local storage for a single thread */ |
| static void *thread_local_storage = NULL; |
| |
| /* Backend initialization functions */ |
| |
| /* Initialize the threads subsystem. */ |
| static inline int |
| __gthread_objc_init_thread_system (void) |
| { |
| /* No thread support available */ |
| return -1; |
| } |
| |
| /* Close the threads subsystem. */ |
| static inline int |
| __gthread_objc_close_thread_system (void) |
| { |
| /* No thread support available */ |
| return -1; |
| } |
| |
| /* Backend thread functions */ |
| |
| /* Create a new thread of execution. */ |
| static inline objc_thread_t |
| __gthread_objc_thread_detach (void (* func)(void *), void * UNUSED(arg)) |
| { |
| /* No thread support available */ |
| return NULL; |
| } |
| |
| /* Set the current thread's priority. */ |
| static inline int |
| __gthread_objc_thread_set_priority (int UNUSED(priority)) |
| { |
| /* No thread support available */ |
| return -1; |
| } |
| |
| /* Return the current thread's priority. */ |
| static inline int |
| __gthread_objc_thread_get_priority (void) |
| { |
| return OBJC_THREAD_INTERACTIVE_PRIORITY; |
| } |
| |
| /* Yield our process time to another thread. */ |
| static inline void |
| __gthread_objc_thread_yield (void) |
| { |
| return; |
| } |
| |
| /* Terminate the current thread. */ |
| static inline int |
| __gthread_objc_thread_exit (void) |
| { |
| /* No thread support available */ |
| /* Should we really exit the program */ |
| /* exit (&__objc_thread_exit_status); */ |
| return -1; |
| } |
| |
| /* Returns an integer value which uniquely describes a thread. */ |
| static inline objc_thread_t |
| __gthread_objc_thread_id (void) |
| { |
| /* No thread support, use 1. */ |
| return (objc_thread_t) 1; |
| } |
| |
| /* Sets the thread's local storage pointer. */ |
| static inline int |
| __gthread_objc_thread_set_data (void *value) |
| { |
| thread_local_storage = value; |
| return 0; |
| } |
| |
| /* Returns the thread's local storage pointer. */ |
| static inline void * |
| __gthread_objc_thread_get_data (void) |
| { |
| return thread_local_storage; |
| } |
| |
| /* Backend mutex functions */ |
| |
| /* Allocate a mutex. */ |
| static inline int |
| __gthread_objc_mutex_allocate (objc_mutex_t UNUSED(mutex)) |
| { |
| return 0; |
| } |
| |
| /* Deallocate a mutex. */ |
| static inline int |
| __gthread_objc_mutex_deallocate (objc_mutex_t UNUSED(mutex)) |
| { |
| return 0; |
| } |
| |
| /* Grab a lock on a mutex. */ |
| static inline int |
| __gthread_objc_mutex_lock (objc_mutex_t UNUSED(mutex)) |
| { |
| /* There can only be one thread, so we always get the lock */ |
| return 0; |
| } |
| |
| /* Try to grab a lock on a mutex. */ |
| static inline int |
| __gthread_objc_mutex_trylock (objc_mutex_t UNUSED(mutex)) |
| { |
| /* There can only be one thread, so we always get the lock */ |
| return 0; |
| } |
| |
| /* Unlock the mutex */ |
| static inline int |
| __gthread_objc_mutex_unlock (objc_mutex_t UNUSED(mutex)) |
| { |
| return 0; |
| } |
| |
| /* Backend condition mutex functions */ |
| |
| /* Allocate a condition. */ |
| static inline int |
| __gthread_objc_condition_allocate (objc_condition_t UNUSED(condition)) |
| { |
| return 0; |
| } |
| |
| /* Deallocate a condition. */ |
| static inline int |
| __gthread_objc_condition_deallocate (objc_condition_t UNUSED(condition)) |
| { |
| return 0; |
| } |
| |
| /* Wait on the condition */ |
| static inline int |
| __gthread_objc_condition_wait (objc_condition_t UNUSED(condition), |
| objc_mutex_t UNUSED(mutex)) |
| { |
| return 0; |
| } |
| |
| /* Wake up all threads waiting on this condition. */ |
| static inline int |
| __gthread_objc_condition_broadcast (objc_condition_t UNUSED(condition)) |
| { |
| return 0; |
| } |
| |
| /* Wake up one thread waiting on this condition. */ |
| static inline int |
| __gthread_objc_condition_signal (objc_condition_t UNUSED(condition)) |
| { |
| return 0; |
| } |
| |
| #else /* _LIBOBJC */ |
| |
| static inline int |
| __gthread_active_p (void) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_mutex_lock (__gthread_mutex_t * UNUSED(mutex)) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_mutex_trylock (__gthread_mutex_t * UNUSED(mutex)) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_mutex_unlock (__gthread_mutex_t * UNUSED(mutex)) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex) |
| { |
| return __gthread_mutex_lock (mutex); |
| } |
| |
| static inline int |
| __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex) |
| { |
| return __gthread_mutex_trylock (mutex); |
| } |
| |
| static inline int |
| __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex) |
| { |
| return __gthread_mutex_unlock (mutex); |
| } |
| |
| #endif /* _LIBOBJC */ |
| |
| #undef UNUSED |
| |
| #endif /* ! GCC_GTHR_SINGLE_H */ |