svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
pthread_mutex_destroy(3c)
pthread_mutex_init(3C) Standard C Library Functions pthread_mutex_init(3C)
NAME
pthread_mutex_init, pthread_mutex_destroy - initialize or destroy a mu‐
tex
SYNOPSIS
#include <pthread.h>
int pthread_mutex_init(pthread_mutex_t *restrict mutex,
const pthread_mutexattr_t *restrict attr);
int pthread_mutex_destroy(pthread_mutex_t *mutex);
pthread_mutex_t mutex= PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
pthread_mutex_t mutex = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP;
DESCRIPTION
The pthread_mutex_init() function initializes the mutex referenced by
mutex with attributes specified by attr. If attr is NULL, the default
mutex attributes are used; the effect is the same as passing the ad‐
dress of a default mutex attributes object. Upon successful initializa‐
tion, the state of the mutex becomes initialized and unlocked.
Except for robust mutexes, attempting to initialize an already initial‐
ized mutex results in undefined behavior.
The pthread_mutex_destroy() function destroys the mutex object refer‐
enced by mutex; the mutex object becomes, in effect, uninitialized. A
destroyed mutex object can be re-initialized using pthread_mu‐
tex_init(); the results of otherwise referencing the object after it
has been destroyed are undefined.
It is safe to destroy an initialized mutex that is unlocked. Attempting
to destroy a locked mutex results in undefined behavior.
In cases where default mutex attributes are appropriate, the macro
PTHREAD_MUTEX_INITIALIZER can be used to initialize mutexes that are
statically allocated. The effect is equivalent to dynamic initializa‐
tion by a call to pthread_mutex_init() with parameter attr specified as
NULL, except that no error checks are performed.
In cases where recursive mutex attributes are appropriate, the macro
PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP can be used to initialize mu‐
texes that are statically allocated. The effect is equivalent to dy‐
namic initialization by a call to pthread_mutex_init() with parameter
attr initialized and with type set to PTHREAD_MUTEX_RECURSIVE, except
that no error checks are performed.
In cases where error check mutex attributes are appropriate, the macro
PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP can be used to initialize mu‐
texes that are statically allocated. The effect is equivalent to dy‐
namic initialization by a call to pthread_mutex_init() with parameter
attr initialized and with type set to PTHREAD_MUTEX_ERRORCHECK, except
that no error checks are performed.
RETURN VALUES
If successful, the pthread_mutex_init() and pthread_mutex_destroy()
functions return 0. Otherwise, an error number is returned to indicate
the error.
ERRORS
The pthread_mutex_init() function will fail if:
EAGAIN The system lacked the necessary resources (other than memory)
to initialize another mutex.
EBUSY An attempt was detected to re-initialize a robust mutex pre‐
viously initialized but not yet destroyed. See pthread_mutex‐
attr_setrobust(3C).
EINVAL An attempt was detected to re-initialize a robust mutex pre‐
viously initialized with a different set of attributes. See
pthread_mutexattr_setrobust(3C).
ENOMEM Insufficient memory exists to initialize the mutex.
EPERM The caller does not have the privilege to perform the opera‐
tion.
The pthread_mutex_init() function may fail if:
EBUSY An attempt was detected to re-initialize the object refer‐
enced by mutex, a mutex previously initialized but not yet
destroyed.
EINVAL The value specified by attr or mutex is invalid.
The pthread_mutex_destroy() function may fail if:
EBUSY An attempt was detected to destroy the object referenced by
mutex while it is locked or referenced (for example, while
being used in a pthread_cond_wait(3C) or pthread_cond_timed‐
wait(3C)) by another thread.
EINVAL The value specified by mutex is invalid.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelMT-Safe _ Stan‐
dardSee standards(7).
SEE ALSO
pthread_mutexattr_setprotocol(3C), pthread_cond_wait(3C), pthread_mu‐
tex_lock(3C), pthread_mutexattr_setprioceiling(3C), pthread_mutex‐
attr_setpshared(3C), pthread_mutexattr_setrobust(3C), pthread_mutex‐
attr_settype(3C), attributes(7), mutex(7), standards(7)
Oracle Solaris 11.4 16 May 2014 pthread_mutex_init(3C)