diff options
Diffstat (limited to 'man3/pthread_getattr_np.3')
| -rw-r--r-- | man3/pthread_getattr_np.3 | 72 |
1 files changed, 35 insertions, 37 deletions
diff --git a/man3/pthread_getattr_np.3 b/man3/pthread_getattr_np.3 index df8d2a67c..be1fb1965 100644 --- a/man3/pthread_getattr_np.3 +++ b/man3/pthread_getattr_np.3 @@ -4,7 +4,7 @@ .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" -.TH pthread_getattr_np 3 2023-02-05 "Linux man-pages 6.03" +.TH pthread_getattr_np 3 2023-07-20 "Linux man-pages 6.05.01" .SH NAME pthread_getattr_np \- get attributes of created thread .SH LIBRARY @@ -75,28 +75,26 @@ and if the .B RLIMIT_STACK resource limit is not supported. -.SH VERSIONS -This function is available since glibc 2.2.3. .SH ATTRIBUTES For an explanation of the terms used in this section, see .BR attributes (7). -.ad l -.nh .TS allbox; lbx lb lb l l l. Interface Attribute Value T{ +.na +.nh .BR pthread_getattr_np () T} Thread safety MT-Safe .TE -.hy -.ad .sp 1 .SH STANDARDS -This function is a nonstandard GNU extension; +GNU; hence the suffix "_np" (nonportable) in the name. +.SH HISTORY +glibc 2.2.3. .SH EXAMPLES The program below demonstrates the use of .BR pthread_getattr_np (). @@ -134,7 +132,7 @@ Thread attributes object after initializations: Guard size = 4097 bytes Stack address = (nil) Stack size = 0x0 (0) bytes - +\& Attributes of created thread: Guard size = 8192 bytes Stack address = 0x40196000 (EOS = 0x40397000) @@ -163,12 +161,12 @@ In this case, the guard size attribute is ignored. .EX .RB "$" " ./a.out \-g 4096 \-s 0x8000 \-a" Allocated thread stack at 0x804d000 - +\& Thread attributes object after initializations: Guard size = 4096 bytes Stack address = 0x804d000 (EOS = 0x8055000) Stack size = 0x8000 (32768) bytes - +\& Attributes of created thread: Guard size = 0 bytes Stack address = 0x804d000 (EOS = 0x8055000) @@ -186,19 +184,19 @@ Attributes of created thread: #include <stdio.h> #include <stdlib.h> #include <unistd.h> - +\& static void display_stack_related_attributes(pthread_attr_t *attr, char *prefix) { int s; size_t stack_size, guard_size; void *stack_addr; - +\& s = pthread_attr_getguardsize(attr, &guard_size); if (s != 0) errc(EXIT_FAILURE, s, "pthread_attr_getguardsize"); printf("%sGuard size = %zu bytes\en", prefix, guard_size); - +\& s = pthread_attr_getstack(attr, &stack_addr, &stack_size); if (s != 0) errc(EXIT_FAILURE, s, "pthread_attr_getstack"); @@ -209,33 +207,33 @@ display_stack_related_attributes(pthread_attr_t *attr, char *prefix) printf("%sStack size = %#zx (%zu) bytes\en", prefix, stack_size, stack_size); } - +\& static void display_thread_attributes(pthread_t thread, char *prefix) { int s; pthread_attr_t attr; - +\& s = pthread_getattr_np(thread, &attr); if (s != 0) errc(EXIT_FAILURE, s, "pthread_getattr_np"); - +\& display_stack_related_attributes(&attr, prefix); - +\& s = pthread_attr_destroy(&attr); if (s != 0) errc(EXIT_FAILURE, s, "pthread_attr_destroy"); } - +\& static void * /* Start function for thread we create */ thread_start(void *arg) { printf("Attributes of created thread:\en"); display_thread_attributes(pthread_self(), "\et"); - +\& exit(EXIT_SUCCESS); /* Terminate all threads */ } - +\& static void usage(char *pname, char *msg) { @@ -246,7 +244,7 @@ usage(char *pname, char *msg) fprintf(stderr, "\et\et\-a means program should allocate stack\en"); exit(EXIT_FAILURE); } - +\& static pthread_attr_t * /* Get thread attributes from command line */ get_thread_attributes_from_cl(int argc, char *argv[], pthread_attr_t *attrp) @@ -259,7 +257,7 @@ get_thread_attributes_from_cl(int argc, char *argv[], allocate_stack = 0; stack_size = \-1; guard_size = \-1; - +\& while ((opt = getopt(argc, argv, "ag:s:")) != \-1) { switch (opt) { case \[aq]a\[aq]: allocate_stack = 1; break; @@ -268,21 +266,21 @@ get_thread_attributes_from_cl(int argc, char *argv[], default: usage(argv[0], NULL); } } - +\& if (allocate_stack && stack_size == \-1) usage(argv[0], "Specifying \-a without \-s makes no sense\en"); - +\& if (argc > optind) usage(argv[0], "Extraneous command\-line arguments\en"); - +\& if (stack_size >= 0 || guard_size > 0) { ret_attrp = attrp; - +\& s = pthread_attr_init(attrp); if (s != 0) errc(EXIT_FAILURE, s, "pthread_attr_init"); } - +\& if (stack_size >= 0) { if (!allocate_stack) { s = pthread_attr_setstacksize(attrp, stack_size); @@ -294,22 +292,22 @@ get_thread_attributes_from_cl(int argc, char *argv[], if (s != 0) errc(EXIT_FAILURE, s, "posix_memalign"); printf("Allocated thread stack at %p\en\en", stack_addr); - +\& s = pthread_attr_setstack(attrp, stack_addr, stack_size); if (s != 0) errc(EXIT_FAILURE, s, "pthread_attr_setstacksize"); } } - +\& if (guard_size >= 0) { s = pthread_attr_setguardsize(attrp, guard_size); if (s != 0) errc(EXIT_FAILURE, s, "pthread_attr_setstacksize"); } - +\& return ret_attrp; } - +\& int main(int argc, char *argv[]) { @@ -318,25 +316,25 @@ main(int argc, char *argv[]) pthread_attr_t attr; pthread_attr_t *attrp = NULL; /* Set to &attr if we initialize a thread attributes object */ - +\& attrp = get_thread_attributes_from_cl(argc, argv, &attr); - +\& if (attrp != NULL) { printf("Thread attributes object after initializations:\en"); display_stack_related_attributes(attrp, "\et"); printf("\en"); } - +\& s = pthread_create(&thr, attrp, &thread_start, NULL); if (s != 0) errc(EXIT_FAILURE, s, "pthread_create"); - +\& if (attrp != NULL) { s = pthread_attr_destroy(attrp); if (s != 0) errc(EXIT_FAILURE, s, "pthread_attr_destroy"); } - +\& pause(); /* Terminates when other thread calls exit() */ } .EE |