diff options
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 17 |
1 files changed, 14 insertions, 3 deletions
@@ -9,14 +9,25 @@ (ptw32_InitializeCriticalSection): Removed.
(ptw32_InitializeCriticalSection): Removed.
(pthread_mutex_init): Apply Thomas Pfaff's original
- patches but altered slightly to avoid using
- critical sections and retain/adapt for different
- mutex types (see log entry for 2001-01-10).
+ patches; remove use of critical sections and adapt
+ for different mutex types (see log entry for 2001-01-10).
+ The disadvantage of using critical sections is that
+ they don't appear to be sharable between processes.
+ This implementation provides the opportunity to place
+ mutex objects in shared memory. Thread priority
+ determines the order in which waiting threads acquire
+ the mutex although the implementation includes a
+ mechanism to prevent threads hogging the mutex through
+ successive unlock/lock operations.
(pthread_mutex_destroy): Likewise.
(pthread_mutex_lock): Likewise.
(pthread_mutex_unlock): Likewise.
(pthread_mutex_trylock): Likewise.
+ * pthread.h (rand_r): Add redundant test of '_seed' arg
+ to avoid "unused variable" warnings. Any good compiler
+ will optimise the test away anyway.
+
* Tagged repository 'exp-2001-02-09-passed'.
2001-02-09 Ross Johnson <rpj@special.ise.canberra.edu.au>
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