* sysdeps/mips/pspinlock.c: Implement spinlocks.
2000-05-31 Andreas Jaeger <aj@suse.de> * sysdeps/mips/pspinlock.c: Implement spinlocks.
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@ -1,3 +1,7 @@
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2000-05-31 Andreas Jaeger <aj@suse.de>
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* sysdeps/mips/pspinlock.c: Implement spinlocks.
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2000-05-28 Ulrich Drepper <drepper@redhat.com>
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* spinlock.c (__pthread_lock): Remove ASSERT.
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@ -21,10 +21,28 @@
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#include <pthread.h>
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/* This implementation is similar to the one used in the Linux kernel. */
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int
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__pthread_spin_lock (pthread_spinlock_t *lock)
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{
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XXX
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unsigned int tmp;
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asm volatile
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(".set\tnoreorder\t\t\t# spin_lock\n"
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".set\tpush\n"
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".set\tmips2\n"
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"1:\tll\t%1, %2\n\t"
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"bnez\t%1, 1b\n\t"
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" li\t%1, 1\n\t"
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"sc\t%1, %0\n\t"
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"beqz\t%1, 1b\n\t"
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".set\tpop\n"
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".set\treorder"
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: "=o" (*lock), "=&r" (tmp)
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: "o" (*lock)
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: "memory");
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return 0;
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}
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weak_alias (__pthread_spin_lock, pthread_spin_lock)
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@ -32,7 +50,8 @@ weak_alias (__pthread_spin_lock, pthread_spin_lock)
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int
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__pthread_spin_trylock (pthread_spinlock_t *lock)
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{
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XXX
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/* To be done. */
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return 0;
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}
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weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
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@ -40,7 +59,14 @@ weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
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int
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__pthread_spin_unlock (pthread_spinlock_t *lock)
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{
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XXX
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asm volatile
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(".set\tnoreorder\t\t\t# spin_unlock\n\t"
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"sw\t$0, %0\n\t"
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".set\treorder"
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: "=o" (*lock)
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: "o" (*lock)
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: "memory");
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return 0;
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}
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weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
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@ -51,7 +77,7 @@ __pthread_spin_init (pthread_spinlock_t *lock, int pshared)
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/* We can ignore the `pshared' parameter. Since we are busy-waiting
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all processes which can access the memory location `lock' points
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to can use the spinlock. */
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XXX
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*lock = 1;
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return 0;
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}
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weak_alias (__pthread_spin_init, pthread_spin_init)
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