| /* Threads compatibility routines for libgcc2 and libobjc. */ |
| /* Compile this one with gcc. */ |
| /* Copyright (C) 1997-2021 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 3, 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. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef GCC_GTHR_SINGLE_H |
| #define GCC_GTHR_SINGLE_H |
| |
| /* Just provide compatibility for mutex handling. */ |
| |
| typedef int __gthread_key_t; |
| typedef int __gthread_once_t; |
| typedef int __gthread_mutex_t; |
| typedef int __gthread_recursive_mutex_t; |
| |
| #define __GTHREAD_ONCE_INIT 0 |
| #define __GTHREAD_MUTEX_INIT 0 |
| #define __GTHREAD_MUTEX_INIT_FUNCTION(mx) do {} while (0) |
| #define __GTHREAD_RECURSIVE_MUTEX_INIT 0 |
| |
| #define UNUSED __attribute__((__unused__)) |
| |
| #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 * arg UNUSED) |
| { |
| /* No thread support available */ |
| return NULL; |
| } |
| |
| /* Set the current thread's priority. */ |
| static inline int |
| __gthread_objc_thread_set_priority (int priority UNUSED) |
| { |
| /* 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 mutex UNUSED) |
| { |
| return 0; |
| } |
| |
| /* Deallocate a mutex. */ |
| static inline int |
| __gthread_objc_mutex_deallocate (objc_mutex_t mutex UNUSED) |
| { |
| return 0; |
| } |
| |
| /* Grab a lock on a mutex. */ |
| static inline int |
| __gthread_objc_mutex_lock (objc_mutex_t mutex UNUSED) |
| { |
| /* 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 mutex UNUSED) |
| { |
| /* 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 mutex UNUSED) |
| { |
| return 0; |
| } |
| |
| /* Backend condition mutex functions */ |
| |
| /* Allocate a condition. */ |
| static inline int |
| __gthread_objc_condition_allocate (objc_condition_t condition UNUSED) |
| { |
| return 0; |
| } |
| |
| /* Deallocate a condition. */ |
| static inline int |
| __gthread_objc_condition_deallocate (objc_condition_t condition UNUSED) |
| { |
| return 0; |
| } |
| |
| /* Wait on the condition */ |
| static inline int |
| __gthread_objc_condition_wait (objc_condition_t condition UNUSED, |
| objc_mutex_t mutex UNUSED) |
| { |
| return 0; |
| } |
| |
| /* Wake up all threads waiting on this condition. */ |
| static inline int |
| __gthread_objc_condition_broadcast (objc_condition_t condition UNUSED) |
| { |
| return 0; |
| } |
| |
| /* Wake up one thread waiting on this condition. */ |
| static inline int |
| __gthread_objc_condition_signal (objc_condition_t condition UNUSED) |
| { |
| return 0; |
| } |
| |
| #else /* _LIBOBJC */ |
| |
| static inline int |
| __gthread_active_p (void) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_once (__gthread_once_t *__once UNUSED, void (*__func) (void) UNUSED) |
| { |
| return 0; |
| } |
| |
| static inline int UNUSED |
| __gthread_key_create (__gthread_key_t *__key UNUSED, void (*__func) (void *) UNUSED) |
| { |
| return 0; |
| } |
| |
| static int UNUSED |
| __gthread_key_delete (__gthread_key_t __key UNUSED) |
| { |
| return 0; |
| } |
| |
| static inline void * |
| __gthread_getspecific (__gthread_key_t __key UNUSED) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_setspecific (__gthread_key_t __key UNUSED, const void *__v UNUSED) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_mutex_destroy (__gthread_mutex_t *__mutex UNUSED) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_mutex_lock (__gthread_mutex_t *__mutex UNUSED) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_mutex_trylock (__gthread_mutex_t *__mutex UNUSED) |
| { |
| return 0; |
| } |
| |
| static inline int |
| __gthread_mutex_unlock (__gthread_mutex_t *__mutex UNUSED) |
| { |
| 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); |
| } |
| |
| static inline int |
| __gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex) |
| { |
| return __gthread_mutex_destroy (__mutex); |
| } |
| |
| #endif /* _LIBOBJC */ |
| |
| #undef UNUSED |
| |
| #endif /* ! GCC_GTHR_SINGLE_H */ |