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| author | Rich Felker <dalias@aerifal.cx> | 2011-02-12 00:22:29 -0500 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2011-02-12 00:22:29 -0500 |
| commit | 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 (patch) | |
| tree | 6eaef0d8a720fa3da580de87b647fff796fe80b3 /src/thread/__wait.c | |
| download | musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.gz | |
initial check-in, version 0.5.0v0.5.0
Diffstat (limited to 'src/thread/__wait.c')
| -rw-r--r-- | src/thread/__wait.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/thread/__wait.c b/src/thread/__wait.c new file mode 100644 index 00000000..8c249cd3 --- /dev/null +++ b/src/thread/__wait.c @@ -0,0 +1,16 @@ +#define SYSCALL_RETURN_ERRNO +#include "pthread_impl.h" + +void __wait(volatile int *addr, volatile int *waiters, int val, int priv) +{ + int spins=50000; + if (priv) priv = 128; priv=0; + while (spins--) { + if (*addr==val) a_spin(); + else return; + } + if (waiters) a_inc(waiters); + while (*addr==val) + syscall4(__NR_futex, (long)addr, FUTEX_WAIT|priv, val, 0); + if (waiters) a_dec(waiters); +} |