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support: Add support_small_thread_stack_size

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It returns the minimum stack size large enough to cover most internal
glibc stack usage.
This commit is contained in:
Adhemerval Zanella 2020-12-29 11:52:41 -03:00
parent c6e0b0b5b0
commit ecdb06cdf2
2 changed files with 11 additions and 3 deletions
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12
support/support_set_small_thread_stack_size.c
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@ -20,8 +20,8 @@
#include <pthread.h> #include <pthread.h>
#include <support/xthread.h> #include <support/xthread.h>
void size_t
support_set_small_thread_stack_size (pthread_attr_t *attr) support_small_thread_stack_size (void)
{ {
/* Some architectures have too small values for PTHREAD_STACK_MIN /* Some architectures have too small values for PTHREAD_STACK_MIN
which cannot be used for creating threads. Ensure that the stack which cannot be used for creating threads. Ensure that the stack
@ -31,5 +31,11 @@ support_set_small_thread_stack_size (pthread_attr_t *attr)
if (stack_size < PTHREAD_STACK_MIN) if (stack_size < PTHREAD_STACK_MIN)
stack_size = PTHREAD_STACK_MIN; stack_size = PTHREAD_STACK_MIN;
#endif #endif
xpthread_attr_setstacksize (attr, stack_size); return stack_size;
}
void
support_set_small_thread_stack_size (pthread_attr_t *attr)
{
xpthread_attr_setstacksize (attr, support_small_thread_stack_size ());
} }

2
support/xthread.h
View File

@ -75,6 +75,8 @@ void xpthread_attr_setstacksize (pthread_attr_t *attr,
void xpthread_attr_setguardsize (pthread_attr_t *attr, void xpthread_attr_setguardsize (pthread_attr_t *attr,
size_t guardsize); size_t guardsize);
/* Return the stack size used on support_set_small_thread_stack_size. */
size_t support_small_thread_stack_size (void);
/* Set the stack size in ATTR to a small value, but still large enough /* Set the stack size in ATTR to a small value, but still large enough
to cover most internal glibc stack usage. */ to cover most internal glibc stack usage. */
void support_set_small_thread_stack_size (pthread_attr_t *attr); void support_set_small_thread_stack_size (pthread_attr_t *attr);