PTHREAD_ATTR_SETSTACKSIZE(3Linux Programmer's ManuPTHREAD_ATTR_SETSTACKSIZE(3) NAME pthread_attr_setstacksize, pthread_attr_getstacksize - set/get stack size attribute in thread attributes object SYNOPSIS #include <pthread.h> int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize); int pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize); Compile and link with -pthread. DESCRIPTION The pthread_attr_setstacksize() function sets the stack size attribute of the thread attributes object referred to by attr to the value speci- fied in stacksize. The stack size attribute determines the minimum size (in bytes) that will be allocated for threads created using the thread attributes object attr. The pthread_attr_getstacksize() function returns the stack size attribute of the thread attributes object referred to by attr in the buffer pointed to by stacksize. RETURN VALUE On success, these functions return 0; on error, they return a nonzero error number. ERRORS pthread_attr_setstacksize() can fail with the following error: EINVAL The stack size is less than PTHREAD_STACK_MIN (16384) bytes. On some systems, pthread_attr_setstacksize() can fail with the error EINVAL if stacksize is not a multiple of the system page size. VERSIONS These functions are provided by glibc since version 2.1. ATTRIBUTES Multithreading (see pthreads(7)) The pthread_attr_setstacksize() and pthread_attr_getstacksize() func- tions are thread-safe. CONFORMING TO POSIX.1-2001. NOTES For details on the default stack size of new threads, see pthread_cre- ate(3). A thread's stack size is fixed at the time of thread creation. Only the main thread can dynamically grow its stack. The pthread_attr_setstack(3) function allows an application to set both the size and location of a caller-allocated stack that is to be used by a thread. BUGS As at glibc 2.8, if the specified stacksize is not a multiple of STACK_ALIGN (16 bytes on most architectures), it may be rounded down- ward, in violation of POSIX.1-2001, which says that the allocated stack will be at least stacksize bytes. EXAMPLE See pthread_create(3). SEE ALSO getrlimit(2), pthread_attr_init(3), pthread_attr_setguardsize(3), pthread_attr_setstack(3), pthread_create(3), pthreads(7) COLOPHON This page is part of release 3.74 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/. Linux 2014-05-28 PTHREAD_ATTR_SETSTACKSIZE(3)
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