pthread_rwlock_attr.h¶
Implementation of a fair, POSIX conforming reader/writer lock (attribute set).
Note
Do not include this header file directly, but pthread.h.
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int
pthread_rwlockattr_init
(pthread_rwlockattr_t * attr)¶ Initilize the attribute set with the defaults.
Default value for pshared:
PTHREAD_PROCESS_PRIVATE
. A zeroed out datum is initialized.Parameters
attr: Attribute set to initialize. Return values
0
on success.EINVAL
ifattr == NULL
.
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int
pthread_rwlockattr_destroy
(pthread_rwlockattr_t * attr)¶ Destroy an attribute set.
This function does nothing, don’t bother calling it.
Parameters
attr: Attribute set to destroy. Return values
0
on success.EINVAL
ifattr == NULL
.
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int
pthread_rwlockattr_getpshared
(const pthread_rwlockattr_t * attr, int * pshared)¶ Read whether to share the lock with child processes.
There are not child processes in RIOT.
Parameters
attr: Attribute set to query. pshared: Either PTHREAD_PROCESS_SHARED
orPTHREAD_PROCESS_PRIVATE
.Return values
0
on success.EINVAL
ifattr == NULL
.
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int
pthread_rwlockattr_setpshared
(pthread_rwlockattr_t * attr, int pshared)¶ Set whether to share the lock with child processes.
There are not child processes in RIOT.
Parameters
attr: Attribute set to operate on. pshared: Either PTHREAD_PROCESS_SHARED
orPTHREAD_PROCESS_PRIVATE
.Return values
0
on success.EINVAL
ifattr == NULL
or a wrong value forpshared
was supplied.
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struct
pthread_rwlockattr_t
¶ Attributes for a new reader/writer lock.
The options set in this struct will be ignored by
pthread_rwlock.h::pthread_rwlock_init()
.-
int
pshared
¶ Whether to share lock with child processes.
Valid values are
PTHREAD_PROCESS_SHARED
andPTHREAD_PROCESS_PRIVATE
. Since RIOT is a single-process operating system, this value is ignored.
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int