#include <RW_Process_Mutex.h>
Collaboration diagram for ACE_RW_Process_Mutex:

Public Methods | |
| ACE_RW_Process_Mutex (const ACE_TCHAR *name = 0, int flags = O_CREAT|O_RDWR) | |
| Create a readers/writer <Process_Mutex>, passing in the optional <name>. If not specified, a name is generated. | |
| ~ACE_RW_Process_Mutex (void) | |
| int | remove (void) |
| int | acquire (void) |
| Acquire lock ownership (wait on queue if necessary). | |
| int | tryacquire (void) |
| int | release (void) |
| Release lock and unblock a thread at head of queue. | |
| int | acquire_read (void) |
| Acquire lock ownership (wait on queue if necessary). | |
| int | acquire_write (void) |
| Acquire lock ownership (wait on queue if necessary). | |
| int | tryacquire_read (void) |
| int | tryacquire_write (void) |
| int | tryacquire_write_upgrade (void) |
| Attempt to upgrade a read lock to a write lock. Returns 0 on success, -1 on failure. | |
| const ACE_File_Lock& | lock (void) const |
| Return the underlying lock. | |
| void | dump (void) const |
| Dump the state of an object. | |
Public Attributes | |
| ACE_ALLOC_HOOK_DECLARE | |
| Declare the dynamic allocation hooks. | |
Private Methods | |
| const ACE_TCHAR* | unique_name (void) |
| Create and return the unique name. | |
Private Attributes | |
| ACE_TCHAR | name_ [ACE_UNIQUE_NAME_LEN] |
| If the user does not provide a name we generate a unique name in this buffer. | |
| ACE_File_Lock | lock_ |
| We need this to get the readers/writer semantics... | |
Note that because this class uses the as its implementation it only can be reliably used between separate processes, rather than threads in the same process. This isn't a limitation of ACE, it's simply the file lock semantics on UNIX and Win32.
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Create a readers/writer <Process_Mutex>, passing in the optional <name>. If not specified, a name is generated.
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Acquire lock ownership (wait on queue if necessary).
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Acquire lock ownership (wait on queue if necessary).
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Acquire lock ownership (wait on queue if necessary).
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Dump the state of an object.
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Return the underlying lock.
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Release lock and unblock a thread at head of queue.
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Explicitly destroy the mutex. Note that only one thread should call this method since it doesn't protect against race conditions. |
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Conditionally acquire lock (i.e., don't wait on queue). Returns -1 on failure. If we "failed" because someone else already had the lock, <errno> is set to <EBUSY>. |
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Conditionally acquire a lock (i.e., won't block). Returns -1 on failure. If we "failed" because someone else already had the lock, <errno> is set to <EBUSY>. |
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Conditionally acquire a lock (i.e., won't block). Returns -1 on failure. If we "failed" because someone else already had the lock, <errno> is set to <EBUSY>. |
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Attempt to upgrade a read lock to a write lock. Returns 0 on success, -1 on failure.
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Create and return the unique name.
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Declare the dynamic allocation hooks.
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We need this to get the readers/writer semantics...
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If the user does not provide a name we generate a unique name in this buffer.
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1.2.3 written by Dimitri van Heesch,
© 1997-2000