diff options
Diffstat (limited to 'libguile/async.h')
-rw-r--r-- | libguile/async.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libguile/async.h b/libguile/async.h index fca230382..e6d71520e 100644 --- a/libguile/async.h +++ b/libguile/async.h @@ -51,6 +51,32 @@ void *scm_c_call_with_unblocked_asyncs (void *(*p) (void *d), void *d); void scm_frame_block_asyncs (void); void scm_frame_unblock_asyncs (void); +/* Critical sections */ + +/* XXX - every critical section needs to be examined whether the + requirements for SCM_CRITICAL_SECTION_START/END are fulfilled. See + the manual. +*/ + +/* Defined in threads.c. scm_i_critical_section_level is only used + for error checking and will go away eventually. */ +extern scm_i_pthread_mutex_t scm_i_critical_section_mutex; +extern int scm_i_critical_section_level; + +#define SCM_CRITICAL_SECTION_START \ + do { \ + scm_i_pthread_mutex_lock (&scm_i_critical_section_mutex);\ + SCM_I_CURRENT_THREAD->block_asyncs++; \ + scm_i_critical_section_level++; \ + } while (0) +#define SCM_CRITICAL_SECTION_END \ + do { \ + scm_i_critical_section_level--; \ + SCM_I_CURRENT_THREAD->block_asyncs--; \ + scm_i_pthread_mutex_unlock (&scm_i_critical_section_mutex); \ + scm_async_click (); \ + } while (0) + SCM_API void scm_init_async (void); #if (SCM_ENABLE_DEPRECATED == 1) |