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* sysdeps/sparc/sparc32/pspinlock.c: Implement spinlocks.

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* sysdeps/sparc/sparc32/sparcv9/pspinlock.c: New. 
* sysdeps/sparc/sparc64/pspinlock.c: Implement spinlocks.
2000-06-02  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/sparc/sparc32/pspinlock.c: Implement spinlocks.
	* sysdeps/sparc/sparc32/sparcv9/pspinlock.c: New.
	* sysdeps/sparc/sparc64/pspinlock.c: Implement spinlocks.
This commit is contained in:
Andreas Jaeger
2000-06-03 08:12:26 +00:00
parent 80c7506e7b
commit 554eca5cf0
4 changed files with 156 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
linuxthreads/sysdeps/sparc/sparc64/pspinlock.c
+31 -4
View File
@@ -21,10 +21,24 @@
#include <pthread.h>
/* This implementation is similar to the one used in the Linux kernel. */
int
__pthread_spin_lock (pthread_spinlock_t *lock)
{
XXX
asm volatile
("1: ldstub [%0], %%g5\n"
" brnz,pn %%g5, 2f\n"
" membar #StoreLoad | #StoreStore\n"
".subsection 2\n"
"2: ldub [%0], %%g5\n"
" brnz,pt 2b\n"
" membar #LoadLoad\n"
" b,a,pt %%xcc, 1b\n"
".previous"
: /* no outputs */
: "r" (lock)
: "g5", "memory");
return 0;
}
weak_alias (__pthread_spin_lock, pthread_spin_lock)
@@ -32,7 +46,14 @@ weak_alias (__pthread_spin_lock, pthread_spin_lock)
int
__pthread_spin_trylock (pthread_spinlock_t *lock)
{
XXX
int result;
asm volatile
("ldstub [%1], %0\n"
"membar #StoreLoad | #StoreStore"
: "=r" (result)
: "r" (lock)
: "memory");
return result == 0 ? 0 : EBUSY;
}
weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
@@ -40,7 +61,13 @@ weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
int
__pthread_spin_unlock (pthread_spinlock_t *lock)
{
XXX
asm volatile
("membar #StoreStore | #LoadStore\n"
"stb %%g0, [%0]"
:
: "r" (lock)
: "memory");
return 0;
}
weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
@@ -51,7 +78,7 @@ __pthread_spin_init (pthread_spinlock_t *lock, int pshared)
/* We can ignore the `pshared' parameter. Since we are busy-waiting
all processes which can access the memory location `lock' points
to can use the spinlock. */
XXX
*lock = 0;
return 0;
}
weak_alias (__pthread_spin_init, pthread_spin_init)