12 lines
308 B
C
12 lines
308 B
C
#include "pthread_impl.h"
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void __lock(volatile int *l)
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{
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int spins=100000;
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/* Do not use futexes because we insist that unlocking is a simple
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* assignment to optimize non-pathological code with no contention. */
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while (a_xchg(l, 1))
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if (spins) spins--, a_spin();
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else __syscall(SYS_sched_yield);
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}
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