libwget-thread - Man Page
Implementation of multi-threading basic functionality
Synopsis
Data Structures
struct wget_thread_st
struct wget_thread_mutex_st
struct wget_thread_cond_st
Functions
int wget_thread_mutex_init (wget_thread_mutex *mutex)
int wget_thread_mutex_destroy (wget_thread_mutex *mutex)
void wget_thread_mutex_lock (wget_thread_mutex mutex)
void wget_thread_mutex_unlock (wget_thread_mutex mutex)
int wget_thread_cond_init (wget_thread_cond *cond)
int wget_thread_cond_destroy (wget_thread_cond *cond)
int wget_thread_cond_signal (wget_thread_cond cond)
int wget_thread_cond_wait (wget_thread_cond cond, wget_thread_mutex mutex, long long ms)
int wget_thread_start (wget_thread *thread, void *(*start_routine)(void *), void *arg, WGET_GCC_UNUSED int flags)
int wget_thread_cancel (WGET_GCC_UNUSED wget_thread thread)
int wget_thread_kill (WGET_GCC_UNUSED wget_thread thread, WGET_GCC_UNUSED int sig)
int wget_thread_join (wget_thread *thread)
wget_thread_id wget_thread_self (void)
bool wget_thread_support (void)
Detailed Description
This is a wrapper around Gnulib's glthread functionality.
It currently supports Posix threads (pthreads), GNU Pth threads, Solaris threads and Windows threads.
Function Documentation
int wget_thread_mutex_init (wget_thread_mutex * mutex)
- Parameters
mutex The mutex to initialize
Returns
0 on success, non-zero on failure
Initializes the mutex.
After usage, a call to wget_thread_mutex_destroy() frees the allocated resources.
int wget_thread_mutex_destroy (wget_thread_mutex * mutex)
- Parameters
mutex The mutex to destroy
Returns
0 on success, non-zero on failure
Free's the mutex and it's resources.
After calling this function, the mutex cannot be used any more.
void wget_thread_mutex_lock (wget_thread_mutex mutex)
- Parameters
mutex The mutex to be locked
Creates a lock on the mutex.
To unlock the mutex, call wget_thread_mutex_unlock().
void wget_thread_mutex_unlock (wget_thread_mutex mutex)
- Parameters
mutex The mutex to be unlocked
Unlocks the mutex.
int wget_thread_cond_init (wget_thread_cond * cond)
- Parameters
cond The conditional to initialize
Returns
0 on success, non-zero on failure
Initializes the conditional cond.
After usage, a call to wget_thread_cond_destroy() frees the allocated resources.
int wget_thread_cond_destroy (wget_thread_cond * cond)
- Parameters
cond The conditional to destroy
Returns
0 on success, non-zero on failure
Free's the conditional cond and it's resources.
After calling this function, cond cannot be used any more.
int wget_thread_cond_signal (wget_thread_cond cond)
- Parameters
cond The conditional to signal a condition
Returns
0 on success, non-zero on failure
Wakes up one (random) thread that waits on the conditional.
int wget_thread_cond_wait (wget_thread_cond cond, wget_thread_mutex mutex, long long ms)
- Parameters
cond The conditional to wait for
mutex The mutex needed for thread-safety
ms The wait timeout in milliseconds
Returns
0 on success, non-zero on failure
Waits for a condition with a max. timeout of ms milliseconds.
To wait forever use a timeout lower or equal then 0.
int wget_thread_start (wget_thread * thread, void *(*)(void *) start_routine, void * arg, WGET_GCC_UNUSED int flags)
- Parameters
thread The thread variable to be initialized
start_routine The thread function to start
arg The argument given to start_routine
flags Currently unused
Returns
0 on success, non-zero on failure
Start start_routine as own thread with argument arg.
int wget_thread_cancel (WGET_GCC_UNUSED wget_thread thread)
- Parameters
thread Thread to cancel
Returns
0 on success, non-zero on failure
Currently a no-op function, since it's not portable.
int wget_thread_kill (WGET_GCC_UNUSED wget_thread thread, WGET_GCC_UNUSED int sig)
- Parameters
thread Thread to send the signal to
sig Signal to send
Returns
0 on success, non-zero on failure
Currently a no-op function, since it's not portable.
int wget_thread_join (wget_thread * thread)
- Parameters
thread Thread to wait for
Returns
0 on success, non-zero on failure
Wait until the thread has been stopped.
This function just waits - to stop a thread you have take your own measurements.
wget_thread_id wget_thread_self (void)
- Returns
The thread id of the caller.
bool wget_thread_support (void)
- Returns
Whether libwget supports multi-threading on this platform or not.
Author
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