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authorZack Weinberg <zackw@panix.com>2017-05-20 18:23:01 -0400
committerZack Weinberg <zackw@panix.com>2017-06-12 17:11:36 -0400
commit46ee3da55ee36af9c930556ad4fca3f69434a067 (patch)
treeb8dec7151e14b7ba37867a5a6a65c934255cfb64 /bits/sched.h
parent4bad368d9f13c2d8b8d2b2cea89a61916223d882 (diff)
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Remove __need_schedparam and __cpu_set_t_defined.
bits/sched.h has logic to expose only an impl-namespace variant of struct sched_param (i.e. struct __sched_param), but nothing uses it, and the only header that includes bits/sched.h is sched.h. The __need_schedparam logic can therefore be removed. bits/sched.h also has a great deal of code relating to cpu_set_t objects that was *almost* the same between the two versions of bits/sched.h in the tree; a little spelunking indicated that this is because some bug fixes got applied to the Linux-specific bits/sched.h but not the generic one. Introduce a new header, bits/cpu-set.h, containing the version of that code with the bugfixes, have sched.h include it directly, and delete all of the code from both versions of bits/sched.h. Also remove the unnecessary name mangling in the definition of struct sched_param -- POSIX specifies a field 'sched_priority', so there is no reason to define it as '__sched_priority' and then paper over that with a macro. (Just in case someone was using the internal name, 'sched_priority' remains a macro defined to expand to itself, and '__sched_priority' now expands to 'sched_priority'.) Finally, as long as I'm touching these files anyway, merge new constants from linux/sched.h into the Linux bits/sched.h. * bits/sched.h: Remove __need_schedparam logic and replace with a normal multiple-include guard. Change field name in struct sched_param from __sched_priority to sched_priority. Delete everything under #ifndef __cpu_set_t_defined. * sysdeps/unix/sysv/linux/bits/sched.h: Likewise. Also sync with kernel sched.h, adding SCHED_ISO and SCHED_DEADLINE constants. * posix/sched.h: Include bits/cpu-set.h as well as bits/sched.h. For compatibility, #define sched_priority to itself, and #define __sched_priority as sched_priority. * posix/bits/cpu-set.h: New file containing, verbatim, the code that was under #ifndef __cpu_set_t_defined in sysdeps/unix/sysv/linux/bits/sched.h. * include/bits/cpu-set.h: New wrapper. * posix/Makefile: Install bits/cpu-set.h.
Diffstat (limited to 'bits/sched.h')
-rw-r--r--bits/sched.h121
1 files changed, 4 insertions, 117 deletions
diff --git a/bits/sched.h b/bits/sched.h
index c36c569..0588f31 100644
--- a/bits/sched.h
+++ b/bits/sched.h
@@ -17,13 +17,13 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#ifndef __need_schedparam
+#ifndef _BITS_SCHED_H
+#define _BITS_SCHED_H 1
#ifndef _SCHED_H
# error "Never include <bits/sched.h> directly; use <sched.h> instead."
#endif
-
/* Scheduling algorithms. */
#define SCHED_OTHER 0
#define SCHED_FIFO 1
@@ -32,120 +32,7 @@
/* Data structure to describe a process' schedulability. */
struct sched_param
{
- int __sched_priority;
+ int sched_priority;
};
-#endif /* need schedparam */
-
-#if !defined __defined_schedparam \
- && (defined __need_schedparam || defined _SCHED_H)
-# define __defined_schedparam 1
-/* Data structure to describe a process' schedulability. */
-struct __sched_param
- {
- int __sched_priority;
- };
-# undef __need_schedparam
-#endif
-
-
-#if defined _SCHED_H && !defined __cpu_set_t_defined
-# define __cpu_set_t_defined
-/* Size definition for CPU sets. */
-# define __CPU_SETSIZE 1024
-# define __NCPUBITS (8 * sizeof (__cpu_mask))
-
-/* Type for array elements in 'cpu_set_t'. */
-typedef unsigned long int __cpu_mask;
-
-/* Basic access functions. */
-# define __CPUELT(cpu) ((cpu) / __NCPUBITS)
-# define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS))
-
-/* Data structure to describe CPU mask. */
-typedef struct
-{
- __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS];
-} cpu_set_t;
-
-/* Access functions for CPU masks. */
-# 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); \
- __cpu_mask *__bits = (cpusetp)->__bits; \
- for (__i = 0; __i < __imax; ++__i) \
- __bits[__i] = 0; \
- } while (0)
-# endif
-# define __CPU_SET_S(cpu, setsize, cpusetp) \
- (__extension__ \
- ({ size_t __cpu = (cpu); \
- __cpu < 8 * (setsize) \
- ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
- |= __CPUMASK (__cpu)) \
- : 0; }))
-# define __CPU_CLR_S(cpu, setsize, cpusetp) \
- (__extension__ \
- ({ size_t __cpu = (cpu); \
- __cpu < 8 * (setsize) \
- ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
- &= ~__CPUMASK (__cpu)) \
- : 0; }))
-# define __CPU_ISSET_S(cpu, setsize, cpusetp) \
- (__extension__ \
- ({ size_t __cpu = (cpu); \
- __cpu < 8 * (setsize) \
- ? ((((const __cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
- & __CPUMASK (__cpu))) != 0 \
- : 0; }))
-
-# define __CPU_COUNT_S(setsize, cpusetp) \
- __sched_cpucount (setsize, cpusetp)
-
-# 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) \
- (__extension__ \
- ({ const __cpu_mask *__arr1 = (cpusetp1)->__bits; \
- const __cpu_mask *__arr2 = (cpusetp2)->__bits; \
- size_t __imax = (setsize) / sizeof (__cpu_mask); \
- size_t __i; \
- for (__i = 0; __i < __imax; ++__i) \
- if (__arr1[__i] != __arr2[__i]) \
- break; \
- __i == __imax; }))
-# endif
-
-# define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \
- (__extension__ \
- ({ cpu_set_t *__dest = (destset); \
- const __cpu_mask *__arr1 = (srcset1)->__bits; \
- const __cpu_mask *__arr2 = (srcset2)->__bits; \
- size_t __imax = (setsize) / sizeof (__cpu_mask); \
- size_t __i; \
- for (__i = 0; __i < __imax; ++__i) \
- ((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i]; \
- __dest; }))
-
-# define __CPU_ALLOC_SIZE(count) \
- ((((count) + __NCPUBITS - 1) / __NCPUBITS) * sizeof (__cpu_mask))
-# define __CPU_ALLOC(count) __sched_cpualloc (count)
-# define __CPU_FREE(cpuset) __sched_cpufree (cpuset)
-
-__BEGIN_DECLS
-
-extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp)
- __THROW;
-extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur;
-extern void __sched_cpufree (cpu_set_t *__set) __THROW;
-
-__END_DECLS
-
-#endif
+#endif /* bits/sched.h */