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PTHREAD_ATTR_GET_NP(3) FreeBSD Library Functions Manual PTHREAD_ATTR_GET_NP(3) NAME pthread_attr_get_np -- get attributes of existent thread LIBRARY POSIX Threads Library (libpthread, -lpthread) SYNOPSIS #include <pthread_np.h> int pthread_attr_get_np(pthread_t pid, pthread_attr_t *dst); DESCRIPTION The pthread_attr_get_np() function is used to get existent thread's at- tributes. Most fields of pthread_attr_t structure are exact values of attributes provided at thread creation time (as parameter to pthread_create(3) function), except for the stack address. Value returned as dst is supposed to be used in conjunction with pthread_attr_get*() functions to retrieve individual values from pthread_attr_t structure. Parameter dst should point to allocated memory area big enough to fit this structure. It is HIGHLY RECOMMENDED to use pthread_attr_init(3) function to allocate attribute storage. IMPLEMENTATION NOTES The pthread_attr_get_np() function will always return a pointer to the thread's real stack address, regardless of its value in the original at- tributes structure. RETURN VALUES If successful, pthread_attr_get_np() function returns 0. Otherwise, an error number is returned to indicate the error. EXAMPLES size_t my_thread_stack_size(pthread_t pid) { pthread_attr_t attr; size_t size; pthread_attr_init(&attr); pthread_attr_get_np(pid, &attr); pthread_attr_getstacksize(&attr, &size); pthread_attr_destroy(&attr); return(size); } ERRORS The pthread_attr_get_np() function will fail if: [EINVAL] Invalid value for one of given parameters. [ESRCH] No thread could be found corresponding to that speci- fied by the given thread ID. SEE ALSO pthread_attr_destroy(3), pthread_attr_getdetachstate(3), pthread_attr_getinheritsched(3), pthread_attr_getschedparam(3), pthread_attr_getschedpolicy(3), pthread_attr_getscope(3), pthread_attr_getstack(3), pthread_attr_getstackaddr(3), pthread_attr_getstacksize(3), pthread_attr_init(3) AUTHORS The pthread_attr_get_np() function and this manual page were written by Alexey Zelkin <phantom@FreeBSD.org>. FreeBSD 13.0 January 31, 2003 FreeBSD 13.0
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | IMPLEMENTATION NOTES | RETURN VALUES | EXAMPLES | ERRORS | SEE ALSO | AUTHORS
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