From f1a997418efb40ea718cf73adc0a68910541bd64 Mon Sep 17 00:00:00 2001 From: Richard Kenner Date: Wed, 25 Jun 1997 16:25:39 -0400 Subject: [PATCH] Define front-end/back-end interface functions and structures. From-SVN: r14311 --- gcc/objc/thr.h | 83 +++++++++++++++++++++++++++++++++++++------------- 1 file changed, 61 insertions(+), 22 deletions(-) diff --git a/gcc/objc/thr.h b/gcc/objc/thr.h index 80331fe692a..f904733695a 100644 --- a/gcc/objc/thr.h +++ b/gcc/objc/thr.h @@ -49,38 +49,53 @@ 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); +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); - -objc_thread_t objc_thread_create(void (*func)(void *arg), void *arg); -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); +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); -int objc_mutex_lock_x(objc_mutex_t mutex, const char *f, int l); -int objc_mutex_unlock_x(objc_mutex_t mutex, const char *f, int l); +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); /* Use this to set the hook function that will be called when the @@ -97,8 +112,32 @@ int objc_mutex_unlock_x(objc_mutex_t mutex, const char *f, int l); typedef void (*objc_thread_callback)(); objc_thread_callback objc_set_thread_callback(objc_thread_callback func); -/* For debugging of locks, uncomment these two macros: */ -/* #define objc_mutex_lock(x) objc_mutex_lock_x(x, __FILE__, __LINE__) */ -/* #define objc_mutex_unlock(x) objc_mutex_unlock_x(x, __FILE__, __LINE__)*/ +/* Backend initialization functions */ +int __objc_init_thread_system(void); +int __objc_fini_thread_system(void); + +/* Backend mutex functions */ +int __objc_mutex_allocate(objc_mutex_t mutex); +int __objc_mutex_deallocate(objc_mutex_t mutex); +int __objc_mutex_lock(objc_mutex_t mutex); +int __objc_mutex_trylock(objc_mutex_t mutex); +int __objc_mutex_unlock(objc_mutex_t mutex); + +/* Backend condition mutex functions */ +int __objc_condition_allocate(objc_condition_t condition); +int __objc_condition_deallocate(objc_condition_t condition); +int __objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex); +int __objc_condition_broadcast(objc_condition_t condition); +int __objc_condition_signal(objc_condition_t condition); + +/* Backend thread functions */ +objc_thread_t __objc_thread_detach(void (*func)(void *arg), void *arg); +int __objc_thread_set_priority(int priority); +int __objc_thread_get_priority(void); +void __objc_thread_yield(void); +int __objc_thread_exit(void); +objc_thread_t __objc_thread_id(void); +int __objc_thread_set_data(void *value); +void * __objc_thread_get_data(void); #endif /* not __thread_INCLUDE_GNU */ -- 2.30.2