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libc: Fix sem_post() implementation to wake up all waiting threads.

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This also allows us to optimize the case where we increment an
uncontended semaphore (no need to call futex_wake() then).

Change-Id: Iad48efe8551dc66dc89d3e3f18c001e5a6c1939f
This commit is contained in:
David 'Digit' Turner
2010-06-28 14:10:14 -07:00
parent a02b93bd75
commit 519763265e
3 changed files with 181 additions and 49 deletions
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libc/unistd/sysconf.c
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@@ -44,7 +44,7 @@
#define SYSTEM_MQ_OPEN_MAX 8
#define SYSTEM_MQ_PRIO_MAX 32768
#define SYSTEM_SEM_NSEMS_MAX 256
#define SYSTEM_SEM_VALUE_MAX (2147483647)
#define SYSTEM_SEM_VALUE_MAX 0x3fffffff /* see bionic/semaphore.c */
#define SYSTEM_SIGQUEUE_MAX 32
#define SYSTEM_TIMER_MAX 32
#define SYSTEM_LOGIN_NAME_MAX 256