diff options
| author | rpj <rpj> | 2001-02-12 08:28:05 +0000 |
|---|---|---|
| committer | rpj <rpj> | 2001-02-12 08:28:05 +0000 |
| commit | 3208cee87389dbe7479e44208f8c0a4f8725fae8 (patch) | |
| tree | 2fa02fd9e27c30d459ea447f76748c99eba3e239 /ChangeLog | |
| parent | 1c38dfed3806cf142ebb0b1be473c88c5b2ac929 (diff) | |
Revamp experimental mutex routines again to make
more atomic and cancel-safe.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 27 |
1 files changed, 27 insertions, 0 deletions
@@ -1,3 +1,30 @@ +2001-02-12 Ross Johnson <rpj@setup1.ise.canberra.edu.au>
+
+ * mutex.c (pthread_mutex_init): Revamped yet again.
+ (pthread_mutex_destroy): Likewise.
+ (pthread_mutex_lock): Likewise.
+ (pthread_mutex_unlock): Likewise.
+ (pthread_mutex_trylock): Likewise.
+ We now guarantee exclusive access to the pthread_mutex_t
+ (ie. the pointer to the pthread_mutex_t_ struct) and
+ therefore also to the mutex object whether initialised
+ or not. We also ensure that mutex objects are not
+ corrupted by a thread when it is asynchronously
+ canceled (by temporarily setting the thread to DEFERRED
+ cancelation mode). This is to say that the mutex routines
+ now manipulate pthread_mutex_t objects atomically and
+ are cancelation-safe.
+ (ptw32_mutex_check_need_init): Removed - no longer needed.
+ * implement.h (PTW32_OBJECT_GET): New macro to
+ wait and exclusively acquire a pthread_mutex_t object.
+ (PTW32_OBJECT_SET): New macro to set and release a
+ pthread_mutex_t object.
+ (PTW32_OBJECT_TRYGET): New macro to check if another
+ thread is accessing a pthread_mutex_t object and either
+ gives exclusive access or returns immediately.
+ (PTW32_OBJECT_IN_USE): New constant for exclusive access to
+ pthread_mutex_t objects.
+
2001-02-09 Ross Johnson <rpj@setup1.ise.canberra.edu.au>
* nonportable.c (pthread_mutex_setdefaulttype_np): New
|