diff options
Diffstat (limited to 'libpthread/linuxthreads/attr.c')
| -rw-r--r-- | libpthread/linuxthreads/attr.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/attr.c b/libpthread/linuxthreads/attr.c new file mode 100644 index 000000000..2907a56a8 --- /dev/null +++ b/libpthread/linuxthreads/attr.c @@ -0,0 +1,214 @@ +/* Linuxthreads - a simple clone()-based implementation of Posix */ +/* threads for Linux. */ +/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ +/* */ +/* This program is free software; you can redistribute it and/or */ +/* modify it under the terms of the GNU Library General Public License */ +/* as published by the Free Software Foundation; either version 2 */ +/* of the License, or (at your option) any later version. */ +/* */ +/* This program is distributed in the hope that it will be useful, */ +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ +/* GNU Library General Public License for more details. */ + +/* changed for uClibc */ +#define __sched_get_priority_min sched_get_priority_min +#define __sched_get_priority_max sched_get_priority_max + +/* Handling of thread attributes */ + +#include <errno.h> +#include <string.h> +#include <unistd.h> +#include <sys/param.h> +#include "pthread.h" +#include "internals.h" + +extern int __getpagesize(void); + +/* NOTE: With uClibc I don't think we need this versioning stuff. + * Therefore, define the function pthread_attr_init() here using + * a strong symbol. */ + +//int __pthread_attr_init_2_1(pthread_attr_t *attr) +int pthread_attr_init(pthread_attr_t *attr) +{ + size_t ps = __getpagesize (); + + attr->__detachstate = PTHREAD_CREATE_JOINABLE; + attr->__schedpolicy = SCHED_OTHER; + attr->__schedparam.sched_priority = 0; + attr->__inheritsched = PTHREAD_EXPLICIT_SCHED; + attr->__scope = PTHREAD_SCOPE_SYSTEM; + attr->__guardsize = ps; + attr->__stackaddr = NULL; + attr->__stackaddr_set = 0; + attr->__stacksize = STACK_SIZE - ps; + return 0; +} + +/* uClibc: leave out this for now. */ +#if DO_PTHREAD_VERSIONING_WITH_UCLIBC +#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING +default_symbol_version (__pthread_attr_init_2_1, pthread_attr_init, GLIBC_2.1); + +int __pthread_attr_init_2_0(pthread_attr_t *attr) +{ + attr->__detachstate = PTHREAD_CREATE_JOINABLE; + attr->__schedpolicy = SCHED_OTHER; + attr->__schedparam.sched_priority = 0; + attr->__inheritsched = PTHREAD_EXPLICIT_SCHED; + attr->__scope = PTHREAD_SCOPE_SYSTEM; + return 0; +} +symbol_version (__pthread_attr_init_2_0, pthread_attr_init, GLIBC_2.0); +#else +strong_alias (__pthread_attr_init_2_1, pthread_attr_init) +#endif +#endif /* DO_PTHREAD_VERSIONING_WITH_UCLIBC */ + +int pthread_attr_destroy(pthread_attr_t *attr) +{ + return 0; +} + +int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate) +{ + if (detachstate < PTHREAD_CREATE_JOINABLE || + detachstate > PTHREAD_CREATE_DETACHED) + return EINVAL; + attr->__detachstate = detachstate; + return 0; +} + +int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate) +{ + *detachstate = attr->__detachstate; + return 0; +} + +int pthread_attr_setschedparam(pthread_attr_t *attr, + const struct sched_param *param) +{ + int max_prio = __sched_get_priority_max(attr->__schedpolicy); + int min_prio = __sched_get_priority_min(attr->__schedpolicy); + + if (param->sched_priority < min_prio || param->sched_priority > max_prio) + return EINVAL; + memcpy (&attr->__schedparam, param, sizeof (struct sched_param)); + return 0; +} + +int pthread_attr_getschedparam(const pthread_attr_t *attr, + struct sched_param *param) +{ + memcpy (param, &attr->__schedparam, sizeof (struct sched_param)); + return 0; +} + +int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy) +{ + if (policy != SCHED_OTHER && policy != SCHED_FIFO && policy != SCHED_RR) + return EINVAL; + attr->__schedpolicy = policy; + return 0; +} + +int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy) +{ + *policy = attr->__schedpolicy; + return 0; +} + +int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit) +{ + if (inherit != PTHREAD_INHERIT_SCHED && inherit != PTHREAD_EXPLICIT_SCHED) + return EINVAL; + attr->__inheritsched = inherit; + return 0; +} + +int pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit) +{ + *inherit = attr->__inheritsched; + return 0; +} + +int pthread_attr_setscope(pthread_attr_t *attr, int scope) +{ + switch (scope) { + case PTHREAD_SCOPE_SYSTEM: + attr->__scope = scope; + return 0; + case PTHREAD_SCOPE_PROCESS: + return ENOTSUP; + default: + return EINVAL; + } +} + +int pthread_attr_getscope(const pthread_attr_t *attr, int *scope) +{ + *scope = attr->__scope; + return 0; +} + +int __pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize) +{ + size_t ps = __getpagesize (); + + /* First round up the guard size. */ + guardsize = roundup (guardsize, ps); + + /* The guard size must not be larger than the stack itself */ + if (guardsize >= attr->__stacksize) return EINVAL; + + attr->__guardsize = guardsize; + + return 0; +} +weak_alias (__pthread_attr_setguardsize, pthread_attr_setguardsize) + +int __pthread_attr_getguardsize(const pthread_attr_t *attr, size_t *guardsize) +{ + *guardsize = attr->__guardsize; + return 0; +} +weak_alias (__pthread_attr_getguardsize, pthread_attr_getguardsize) + +int __pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr) +{ + attr->__stackaddr = stackaddr; + attr->__stackaddr_set = 1; + return 0; +} +weak_alias (__pthread_attr_setstackaddr, pthread_attr_setstackaddr) + +int __pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackaddr) +{ + /* XXX This function has a stupid definition. The standard specifies + no error value but what is if no stack address was set? We simply + return the value we have in the member. */ + *stackaddr = attr->__stackaddr; + return 0; +} +weak_alias (__pthread_attr_getstackaddr, pthread_attr_getstackaddr) + +int __pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize) +{ + /* We don't accept value smaller than PTHREAD_STACK_MIN. */ + if (stacksize < PTHREAD_STACK_MIN) + return EINVAL; + + attr->__stacksize = stacksize; + return 0; +} +weak_alias (__pthread_attr_setstacksize, pthread_attr_setstacksize) + +int __pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize) +{ + *stacksize = attr->__stacksize; + return 0; +} +weak_alias (__pthread_attr_getstacksize, pthread_attr_getstacksize) |