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tis_mutex_init(3) Library Functions Manual tis_mutex_init(3) NAME
tis_mutex_init - Initializes a mutex object. LIBRARY
Standard C Library (libc.so, libc.a) SYNOPSIS
#include <tis.h> int tis_mutex_init( pthread_mutex_t *mutex); STANDARDS
None PARAMETERS
Pointer to a mutex object (passed by reference) to be initialized. DESCRIPTION
This routine initializes a mutex object with the DECthreads default mutex attributes. A mutex is a synchronization object that allows mul- tiple threads to serialize their access to shared data. The mutex is initialized and set to an unlocked state. Your program can use the PTHREAD_MUTEX_INITIALIZER macro to statically initialize a mutex object without calling this routine. Static ini- tialization can be used only for a condition variable with class extern or static - automatic (stack local) objects must be initialized by calling tis_mutex_init(3). Use this macro as follows: pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER RETURN VALUES
If an error condition occurs, this routine returns an integer value indicating the type of error, the mutex is not initialized, and the contents of mutex are undefined. Possible return values are as follows: Successful completion. The system lacks the necessary resources to initialize a mutex. The implementation has detected an attempt to reinitialize mutex (a previously initialized, but not yet destroyed mutex). The value specified by mutex is not a valid mutex. Insufficient memory exists to initialize the mutex. The caller does not have privileges to perform this operation. ERRORS
None RELATED INFORMATION
Functions: tis_mutex_destroy(3), tis_mutex_lock(3), tis_mutex_trylock(3), tis_mutex_unlock(3) Manuals: Guide to DECthreads and Programmer's Guide delim off tis_mutex_init(3)
