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0 Command: pthread_attr_getguardsize_np | Section: 3 | Source: Digital UNIX | File: pthread_attr_getguardsize_np.3.gz
pthread_at...ardsize_np(3) Library Functions Manual pthread_at...ardsize_np(3) NAME pthread_attr_getguardsize_np - Obtains the guardsize attribute of the specified thread attributes object. LIBRARY DECthreads POSIX 1003.1c Library (libpthread.so) SYNOPSIS #include <pthread.h> int pthread_attr_getguardsize_np( const pthread_attr_t *attr, size_t *guardsize); STANDARDS None PARAMETERS Address of the thread attributes object whose guardsize attribute is obtained. Receives the value of the guardsize attribute of the thread attributes object specified by attr. DESCRIPTION This routine obtains the value of the guardsize attribute of the thread attributes object specified in the attr argument and stores it in the location specified by the guardsize argument. The specified attributes object must already be initialized at the time this routine called. When creating a thread, use a thread attributes object to specify non- default values for thread attributes. The guardsize attribute of a thread attributes object specifies the minimum size (in bytes) of the guard area for the stack of a new thread. A guard area can help a multithreaded program detect overflow of a thread's stack. A guard area is a region of no-access memory that DEC- threads allocates at the overflow end of the thread's stack. When any thread attempts to access a memory location within this region, a mem- ory addressing violation occurs. NOTES The value of the guardsize attribute of a particular thread attributes object does not necessarily correspond to the actual size of the stack guard area of any existing thread in your multithreaded program. This routine has been superseded by the pthread_attr_getguardsize(3) routine, as specified by the Single UNIX Specification, Version 2. RETURN VALUES If an error condition occurs, this routine returns an integer value in- dicating the type of error. Possible return values are as follows: Successful completion. The value specified by attr is invalid. ERRORS None RELATED INFORMATION Functions: pthread_attr_init(3), pthread_attr_setguardsize_np(3) Manuals: Guide to DECthreads and Programmer's Guide delim off pthread_at...ardsize_np(3)

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