The QLock class is a wrapper for a System V shared semaphore.
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#include <qlock_p.h>
Lista de todos los miembros.
Tipos públicos |
| enum | Type { Read,
Write,
Read,
Write
} |
| enum | Type { Read,
Write,
Read,
Write
} |
Métodos públicos |
| | QLock (const QString &filename, char id, bool create=FALSE) |
| | ~QLock () |
| bool | isValid () const |
| void | lock (Type type) |
| void | unlock () |
| bool | locked () const |
| | QLock (const QString &filename, char id, bool create=FALSE) |
| | ~QLock () |
| bool | isValid () const |
| void | lock (Type type) |
| void | unlock () |
| bool | locked () const |
Descripción detallada
The QLock class is a wrapper for a System V shared semaphore.
Documentación de las enumeraciones miembro de la clase
Read Write
- Valores de enumeraciones:
-
- Valores de enumeraciones:
-
Documentación del constructor y destructor
| QLock::QLock |
( |
const QString & |
filename, |
|
|
char |
id, |
|
|
bool |
create = FALSE |
|
) |
| |
Creates a lock. filename is the file path of the Unix-domain socket the Qt/Embedded client is using. id is the name of the particular lock to be created on that socket. If create is TRUE the lock is to be created (as the Qt/Embedded server does); if create is FALSE the lock should exist already (as the Qt/Embedded client expects).
| QLock::QLock |
( |
const QString & |
filename, |
|
|
char |
id, |
|
|
bool |
create = FALSE |
|
) |
| |
Documentación de las funciones miembro
| bool QLock::isValid |
( |
void |
| ) |
const |
Returns TRUE if the lock constructor was succesful; returns FALSE if the lock could not be created or was not available to connect to.
| bool QLock::isValid |
( |
| ) |
const |
| void QLock::lock |
( |
Type |
t | ) |
|
Locks the semaphore with a lock of type t. Locks can either be Read or Write. If a lock is Read, attempts by other processes to obtain Read locks will succeed, and Write attempts will block until the lock is unlocked. If locked as Write, all attempts to lock by other processes will block until the lock is unlocked. Locks are stacked: i.e. a given QLock can be locked multiple times by the same process without blocking, and will only be unlocked after a corresponding number of unlock() calls.
| void QLock::lock |
( |
Type |
type | ) |
|
| bool QLock::locked |
( |
| ) |
const |
| bool QLock::locked |
( |
| ) |
const |
Returns TRUE if the lock is currently held by the current process; otherwise returns FALSE.
| void QLock::unlock |
( |
void |
| ) |
|
Unlocks the semaphore. If other processes were blocking waiting to lock() the semaphore, one of them will wake up and succeed in lock()ing.
La documentación para esta clase fue generada a partir de los siguientes ficheros:
1.7.4
