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(objc_set_thread_callback): New function.

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(objc_thread_callback): Typedef for the hook function.

From-SVN: r12260
This commit is contained in:
Richard Kenner 1996-06-10 11:58:20 -04:00
parent 8c3f352664
commit f2433f89b4
1 changed files with 15 additions and 0 deletions
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15
gcc/objc/thr.h
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@ -75,6 +75,21 @@ _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);
/*
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)();
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__)*/