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-rw-r--r--ace/SV_Semaphore_Simple.h138
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diff --git a/ace/SV_Semaphore_Simple.h b/ace/SV_Semaphore_Simple.h
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--- a/ace/SV_Semaphore_Simple.h
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-/* -*- C++ -*- */
-// $Id$
-
-
-// ============================================================================
-//
-// = LIBRARY
-// ace
-//
-// = FILENAME
-// SV_Semaphore_Simple.h
-//
-// = AUTHOR
-// Doug Schmidt
-//
-// ============================================================================
-
-#if !defined (ACE_SV_SEMAPHORE_SIMPLE_H)
-#define ACE_SV_SEMAPHORE_SIMPLE_H
-
-#include "ace/ACE.h"
-
-class ACE_Export ACE_SV_Semaphore_Simple
- // = TITLE
- // This is a simple semaphore package that assumes there are
- // no race conditions for initialization (i.e., the order of
- // process startup must be well defined).
-{
-public:
- enum
- {
- ACE_CREATE = IPC_CREAT,
- ACE_OPEN = 0
- };
-
- // = Initialization and termination methods.
- ACE_SV_Semaphore_Simple (void);
- ACE_SV_Semaphore_Simple (key_t key,
- int flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
- int initial_value = 1,
- u_short nsems = 1,
- int perms = ACE_DEFAULT_FILE_PERMS);
- ACE_SV_Semaphore_Simple (const char *name,
- int flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
- int initial_value = 1,
- u_short nsems = 1,
- int perms = ACE_DEFAULT_FILE_PERMS);
- ~ACE_SV_Semaphore_Simple (void);
-
- int open (const char *name,
- int flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
- int initial_value = 1,
- u_short nsems = 1,
- int perms = ACE_DEFAULT_FILE_PERMS);
-
- int open (key_t key,
- int flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
- int initial_value = 1,
- u_short nsems = 1,
- int perms = ACE_DEFAULT_FILE_PERMS);
- // Open or create one or more SV_Semaphores. We return 0 if all is
- // OK, else -1.
-
- int close (void);
- // Close a ACE_SV_Semaphore, marking it as invalid for subsequent
- // operations...
-
- int remove (void) const;
- // Remove all SV_Semaphores associated with a particular key. This
- // call is intended to be called from a server, for example, when it
- // is being shut down, as we do an IPC_RMID on the ACE_SV_Semaphore,
- // regardless of whether other processes may be using it or not.
- // Most other processes should use close() below.
-
- // = Semaphore acquire and release methods.
- int acquire (u_short n = 0, int flags = 0) const;
- // Wait until a ACE_SV_Semaphore's value is greater than 0, the
- // decrement it by 1 and return. Dijkstra's P operation, Tannenbaums
- // DOWN operation.
-
- int acquire_read (u_short n = 0, int flags = 0) const;
- // Acquire a semaphore for reading.
-
- int acquire_write (u_short n = 0, int flags = 0) const;
- // Acquire a semaphore for writing
-
- int tryacquire (u_short n = 0, int flags = 0) const;
- // Non-blocking version of <acquire>.
-
- int tryacquire_read (u_short n = 0, int flags = 0) const;
- // Try to acquire the semaphore for reading.
-
- int tryacquire_write (u_short n = 0, int flags = 0) const;
- // Try to acquire the semaphore for writing.
-
- int release (u_short n = 0, int flags = 0) const;
- // Increment ACE_SV_Semaphore by one. Dijkstra's V operation,
- // Tannenbaums UP operation.
-
- // = Semaphore operation methods.
- int op (int val, u_short semnum = 0, int flags = 0) const;
- // General ACE_SV_Semaphore operation. Increment or decrement by a
- // specific amount (positive or negative; amount can`t be zero).
-
- int op (sembuf op_vec[], u_short nsems) const;
- // General ACE_SV_Semaphore operation on an array of SV_Semaphores.
-
- // = Semaphore control methods.
- int control (int cmd, semun arg, u_short n = 0) const;
- int control (int cmd, int value = 0, u_short n = 0) const;
-
- int get_id (void) const;
- // Get underlying internal id.
-
- void dump (void) const;
- // Dump the state of an object.
-
- ACE_ALLOC_HOOK_DECLARE;
- // Declare the dynamic allocation hooks.
-
-protected:
- key_t key_;
- int internal_id_;
- int sem_number_;
-
- int init (key_t k = ACE_INVALID_SEM_KEY, int i = -1);
- key_t name_2_key (const char *name);
- // Convert name to key This function is used internally to create
- // keys for the semaphores. A valid name contains letters and
- // digits only and MUST start with a letter.
- //
- // The method for generating names is not very sophisticated, so
- // caller should not pass strings which match each other for the first
- // LUSED characters when he wants to get a different key.
-};
-
-#include "ace/SV_Semaphore_Simple.i"
-#endif /* _SV_SEMAPHORE_SIMPLE_H */