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authorUlrich Drepper <drepper@redhat.com>1998-03-13 00:56:15 +0000
committerUlrich Drepper <drepper@redhat.com>1998-03-13 00:56:15 +0000
commit5d409851a35412607aeccef8426f402fbf27a102 (patch)
treea215d7204ea129f65f77405b3e9150c105c2a4e1 /linuxthreads/attr.c
parent441e41325ef99b5b469ae1291c309769464c5de9 (diff)
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Update.
1998-03-13 00:46 Ulrich Drepper <drepper@cygnus.com> * attr.c: Implement pthread_attr_[gs]etguardsize, pthread_attr_[gs]setstackaddr, pthread_attr_[gs]etstacksize. Change pthread_attr_init to have two interfaces. * internals.h (struct _pthread_descr_struct): Add new fields for above functions. * libpthread.map: Add names in GLIBC_2.1 section. * manager.c (pthread_handle_create): Implement guardsize and user stack. (pthread_free): Likewise. * pthread.c (pthread_create): Add new interface for changed pthread_attr_t. * sysdeps/pthread/pthread.h: Add prototypes for new functions. * sysdeps/unix/sysv/linux/bits/local_lim.h: Add definition of PTHREAD_STACK_MIN. * manager.c: Enable resetting of the thread scheduling policy to SCHED_OTHER when the parent thread has a different one.
Diffstat (limited to 'linuxthreads/attr.c')
-rw-r--r--linuxthreads/attr.c90
1 files changed, 89 insertions, 1 deletions
diff --git a/linuxthreads/attr.c b/linuxthreads/attr.c
index 9622b5706b..76c137660e 100644
--- a/linuxthreads/attr.c
+++ b/linuxthreads/attr.c
@@ -15,10 +15,30 @@
/* Handling of thread attributes */
#include <unistd.h>
+#include <sys/param.h>
#include "pthread.h"
#include "internals.h"
-int pthread_attr_init(pthread_attr_t *attr)
+
+int __pthread_attr_init_2_1(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;
+}
+#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;
@@ -27,6 +47,10 @@ int pthread_attr_init(pthread_attr_t *attr)
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
int pthread_attr_destroy(pthread_attr_t *attr)
{
@@ -115,3 +139,67 @@ 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 current implementation of LinuxThreads allocates 2MB stack space
+ for each thread. So the maximum guardsize is 2MB - pagesize. */
+ if (guardsize >= STACK_SIZE - ps)
+ 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_etstackaddr)
+
+int __pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize)
+{
+ size_t ps = __getpagesize ();
+
+ /* We don't accept value smaller than PTHREAD_STACK_MIN or bigger than
+ 2MB - pagesize. */
+ if (stacksize < PTHREAD_STACK_MIN || stacksize > STACK_SIZE - ps)
+ 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)