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pthread_mutexattr_destroy(3c) [sunos man page]

pthread_mutexattr_init(3C)												pthread_mutexattr_init(3C)

pthread_mutexattr_init, pthread_mutexattr_destroy - initialize or destroy mutex attributes object SYNOPSIS
cc -mt [ flag... ] file... -lpthread [ library... ] #include <pthread.h> int pthread_mutexattr_init(pthread_mutexattr_t *attr); int pthread_mutexattr_destroy(pthread_mutexattr_t *attr); The pthread_mutexattr_init() function initializes a mutex attributes object attr with the default value for all of the attributes defined by the implementation. The effect of initializing an already initialized mutex attributes object is undefined. After a mutex attributes object has been used to initialize one or more mutexes, any function affecting the attributes object (including destruction) does not affect any previously initialized mutexes. The pthread_mutexattr_destroy() function destroys a mutex attributes object; the object becomes, in effect, uninitialized. An implementa- tion may cause pthread_mutexattr_destroy() to set the object referenced by attr to an invalid value. A destroyed mutex attributes object can be re-initialized using pthread_mutexattr_init(); the results of otherwise referencing the object after it has been destroyed are undefined. Upon successful completion, pthread_mutexattr_init() and pthread_mutexattr_destroy() return 0. Otherwise, an error number is returned to indicate the error. The pthread_mutexattr_init() function may fail if: ENOMEM Insufficient memory exists to initialize the mutex attributes object. The pthread_mutexattr_destroy() function may fail if: EINVAL The value specified by attr is invalid. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ pthread_cond_init(3C), pthread_create(3C), pthread_mutex_init(3C), pthread_mutexattr_settype(3C), attributes(5), standards(5) 23 Mar 2005 pthread_mutexattr_init(3C)

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pthread_mutexattr_init(3)				     Library Functions Manual					 pthread_mutexattr_init(3)

pthread_mutexattr_init - Initializes a mutex attributes object. LIBRARY
DECthreads POSIX 1003.1c Library ( SYNOPSIS
#include <pthread.h> int pthread_mutexattr_init( pthread_mutexattr_t *attr); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: IEEE Std 1003.1c-1995, POSIX System Application Program Interface PARAMETERS
Address of the mutex attributes object to be initialized. DESCRIPTION
This routine initializes the mutex attributes object specified by the attr argument with a set of default values. A mutex attributes object is used to specify the attributes of one or more mutexes when they are created. The attributes object created by this routine is used only in calls to the pthread_mutex_init(3) routine. When a mutex attributes object is used to create a mutex, the values of the individual attributes determine the characteristics of the new mutex. Thus, attributes objects act as additional arguments to mutex creation. Changing individual attributes in an attributes object does not affect any mutexes that were previously created using that attributes object. You can use the same mutex attributes object in successive calls to pthread_mutex_init(3), from any thread. If multiple threads can change attributes in a shared mutex attributes object, your program must use a mutex to protect the integrity of the attributes object's contents. Results are undefined if this routine is called and the attr argument specifies a mutex attributes object that is already initialized. RETURN VALUES
If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows: Successful completion. Insufficient memory to create the mutex attributes object. ERRORS
Functions: pthread_mutexattr_destroy(3), pthread_mutexattr_gettype(3), pthread_mutexattr_settype(3), pthread_mutex_init(3) Manuals: Guide to DECthreads and Programmer's Guide delim off pthread_mutexattr_init(3)

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