117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
/* Thread and mutex controls for Objective C.
|
|
Copyright (C) 1996-2018 Free Software Foundation, Inc.
|
|
Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
|
|
|
|
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 __thread_INCLUDE_GNU
|
|
#define __thread_INCLUDE_GNU
|
|
|
|
#include "objc.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /* __cplusplus */
|
|
|
|
/*************************************************************************
|
|
* Universal static variables:
|
|
*/
|
|
extern int __objc_thread_exit_status; /* Global exit status. */
|
|
|
|
/********
|
|
* Thread safe implementation types and functions.
|
|
*/
|
|
|
|
/* Thread priorities */
|
|
#define OBJC_THREAD_INTERACTIVE_PRIORITY 2
|
|
#define OBJC_THREAD_BACKGROUND_PRIORITY 1
|
|
#define OBJC_THREAD_LOW_PRIORITY 0
|
|
|
|
/* A thread */
|
|
typedef void * objc_thread_t;
|
|
|
|
/* This structure represents a single mutual exclusion lock. */
|
|
struct objc_mutex
|
|
{
|
|
volatile objc_thread_t owner; /* Id of thread that owns. */
|
|
volatile int depth; /* # of acquires. */
|
|
void * backend; /* Specific to backend */
|
|
};
|
|
typedef struct objc_mutex *objc_mutex_t;
|
|
|
|
/* This structure represents a single condition mutex */
|
|
struct objc_condition
|
|
{
|
|
void * backend; /* Specific to backend */
|
|
};
|
|
typedef struct objc_condition *objc_condition_t;
|
|
|
|
/* Frontend mutex functions */
|
|
objc_mutex_t objc_mutex_allocate (void);
|
|
int objc_mutex_deallocate (objc_mutex_t mutex);
|
|
int objc_mutex_lock (objc_mutex_t mutex);
|
|
int objc_mutex_unlock (objc_mutex_t mutex);
|
|
int objc_mutex_trylock (objc_mutex_t mutex);
|
|
|
|
/* Frontend condition mutex functions */
|
|
objc_condition_t objc_condition_allocate (void);
|
|
int objc_condition_deallocate (objc_condition_t condition);
|
|
int objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex);
|
|
int objc_condition_signal (objc_condition_t condition);
|
|
int objc_condition_broadcast (objc_condition_t condition);
|
|
|
|
/* Frontend thread functions */
|
|
objc_thread_t objc_thread_detach (SEL selector, id object, id argument);
|
|
void objc_thread_yield (void);
|
|
int objc_thread_exit (void);
|
|
int objc_thread_set_priority (int priority);
|
|
int objc_thread_get_priority (void);
|
|
void * objc_thread_get_data (void);
|
|
int objc_thread_set_data (void *value);
|
|
objc_thread_t objc_thread_id (void);
|
|
void objc_thread_add (void);
|
|
void objc_thread_remove (void);
|
|
|
|
/*
|
|
Use this to set the hook function that will be called when the
|
|
runtime initially becomes multi threaded.
|
|
The hook function is only called once, meaning only when the
|
|
2nd thread is spawned, not for each and every thread.
|
|
|
|
It returns the previous hook function or NULL if there is none.
|
|
|
|
A program outside of the runtime could set this to some function so
|
|
it can be informed; for example, the GNUstep Base Library sets it
|
|
so it can implement the NSBecomingMultiThreaded notification.
|
|
*/
|
|
typedef void (*objc_thread_callback) (void);
|
|
objc_thread_callback objc_set_thread_callback (objc_thread_callback func);
|
|
|
|
/* Backend initialization functions */
|
|
int __objc_init_thread_system (void);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|
|
#endif /* not __thread_INCLUDE_GNU */
|