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Implement pthread_cond_broadcast on Windows

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See http://www.cse.wustl.edu/~schmidt/win32-cv-1.html, section "The
SignalObjectAndWait solution". But note that this implementation does not
use SignalObjectAndWait (which is needed to achieve fairness, but we do
not need fairness).

Note that our implementations of pthread_cond_broadcast and
pthread_cond_signal require that they are invoked with the mutex held that
is used in the pthread_cond_wait calls.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Sixt
2010-01-30 00:54:05 +01:00
committed by Junio C Hamano
parent a004fb923d
commit 947c3464e4
2 changed files with 93 additions and 14 deletions
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9
compat/win32/pthread.h
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@ -32,17 +32,18 @@
* See also: http://www.cse.wustl.edu/~schmidt/win32-cv-1.html
*/
typedef struct {
volatile LONG waiters;
LONG waiters;
int was_broadcast;
CRITICAL_SECTION waiters_lock;
HANDLE sema;
HANDLE continue_broadcast;
} pthread_cond_t;
extern int pthread_cond_init(pthread_cond_t *cond, const void *unused);
extern int pthread_cond_destroy(pthread_cond_t *cond);
extern int pthread_cond_wait(pthread_cond_t *cond, CRITICAL_SECTION *mutex);
extern int pthread_cond_signal(pthread_cond_t *cond);
extern int pthread_cond_broadcast(pthread_cond_t *cond);
/*
* Simple thread creation implementation using pthread API