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* sysdeps/unix/sysv/linux/bits/sched.h (__CPU_ZERO_S): Optimize

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using gcc builtin.
	(__CPU_EQUAL_S): Likewise.
This commit is contained in:
Ulrich Drepper 2007-07-29 22:43:00 +00:00
parent 44f08a6ecc
commit c5705565e5
2 changed files with 17 additions and 3 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2007-07-29 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/bits/sched.h (__CPU_ZERO_S): Optimize
using gcc builtin.
(__CPU_EQUAL_S): Likewise.
* posix/Makefile (routines): Add sched_cpualloc and sched_cpufree.
(tests): Add tst-cpuset.
* posix/sched_cpualloc.c: New file.

16
sysdeps/unix/sysv/linux/bits/sched.h
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@ -104,7 +104,7 @@ struct __sched_param
# define __CPU_SETSIZE 1024
# define __NCPUBITS (8 * sizeof (__cpu_mask))
/* Type for array elements in 'cpu_set'. */
/* Type for array elements in 'cpu_set_t'. */
typedef unsigned long int __cpu_mask;
/* Basic access functions. */
@ -118,7 +118,11 @@ typedef struct
} cpu_set_t;
/* Access functions for CPU masks. */
# define __CPU_ZERO_S(setsize, cpusetp) \
# if __GNUC_PREREQ (2, 91)
# define __CPU_ZERO_S(setsize, cpusetp) \
do __builtin_memset (cpusetp, '\0', setsize); while (0)
# else
# define __CPU_ZERO_S(setsize, cpusetp) \
do { \
size_t __i; \
size_t __imax = (setsize) / sizeof (__cpu_mask); \
@ -126,6 +130,7 @@ typedef struct
for (__i = 0; __i < __imax; ++__i) \
__arr->__bits[__i] = 0; \
} while (0)
# endif
# define __CPU_SET_S(cpu, setsize, cpusetp) \
({ size_t __cpu = (cpu); \
__cpu < 8 * (setsize) \
@ -142,7 +147,11 @@ typedef struct
# define __CPU_COUNT_S(setsize, cpusetp) \
__sched_cpucount (setsize, cpusetp)
# define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
# if __GNUC_PREREQ (2, 91)
# define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
(__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0)
# else
# define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
({ cpu_set_t *__arr1 = (cpusetp1); \
cpu_set_t *__arr2 = (cpusetp2); \
size_t __imax = (setsize) / sizeof (__cpu_mask); \
@ -151,6 +160,7 @@ typedef struct
if (__arr1->__bits[__i] != __arr2->__bits[__i]) \
break; \
__i == __imax; })
# endif
# define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \
({ cpu_set_t *__dest = (destset); \