diff options
| author | Michael I. Bushnell <mib@gnu.org> | 1995-08-30 15:51:41 +0000 |
|---|---|---|
| committer | Michael I. Bushnell <mib@gnu.org> | 1995-08-30 15:51:41 +0000 |
| commit | 72b7f4212f16326c465dcace478b2d679ea4e507 (patch) | |
| tree | 705d8886a8dc2efc39c2e13f6ce21a6cfe91795e /libthreads | |
| parent | 0b9692b6f3d8cd44b73b81bc634931c8ed0f0ebe (diff) | |
(condition_implies, condition_unimplies): New functions.
(struct condition): New member `implications'.
(cond_imp): New structure.
(cond_signal): Return int now.
(condition_broadcast): Always call cond_broadcast if this condition
has implications.
(condition_signal): Always call cond_signal if this condition has
implications.
Diffstat (limited to 'libthreads')
| -rw-r--r-- | libthreads/cthreads.h | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/libthreads/cthreads.h b/libthreads/cthreads.h index 08394ae5..38d88545 100644 --- a/libthreads/cthreads.h +++ b/libthreads/cthreads.h @@ -26,6 +26,9 @@ /* * HISTORY * $Log: cthreads.h,v $ + * Revision 1.8 1995/08/30 15:10:23 mib + * (hurd_condition_wait): Provide declaration. + * * Revision 1.7 1995/07/18 17:15:51 mib * Reverse previous change. * @@ -374,8 +377,15 @@ typedef struct condition { spin_lock_t lock; struct cthread_queue queue; char *name; + struct cond_imp *implications; } *condition_t; +struct cond_imp +{ + struct condition *implicatand; + struct cond_imp *next; +}; + #define CONDITION_INITIALIZER { SPIN_LOCK_INITIALIZER, QUEUE_INITIALIZER, 0 } #define condition_alloc() ((condition_t) calloc(1, sizeof(struct condition))) @@ -399,19 +409,19 @@ typedef struct condition { #define condition_signal(c) \ MACRO_BEGIN \ - if ((c)->queue.head) { \ + if ((c)->queue.head || (c)->implications) { \ cond_signal(c); \ } \ MACRO_END #define condition_broadcast(c) \ MACRO_BEGIN \ - if ((c)->queue.head) { \ + if ((c)->queue.head || (c)->implications) { \ cond_broadcast(c); \ } \ MACRO_END -extern void +extern int cond_signal C_ARG_DECLS((condition_t c)); extern void @@ -423,6 +433,12 @@ condition_wait C_ARG_DECLS((condition_t c, mutex_t m)); extern int hurd_condition_wait C_ARG_DECLS((condition_t c, mutex_t m)); +extern void +condition_implies C_ARG_DECLS((condition_t implicator, condition_t implicatand)); + +extern void +condition_unimplies C_ARG_DECLS((condition_t implicator, condition_t implicatand)); + /* * Threads. */ |