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Remove deps in prep for submodule
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2217 changed files with 0 additions and 591372 deletions
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// -*- C++ -*-
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//==========================================================================
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/**
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* @file SV_Semaphore_Simple.h
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*
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* $Id: SV_Semaphore_Simple.h 97314 2013-09-03 13:11:59Z johnnyw $
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*
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* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
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*/
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//==========================================================================
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#ifndef ACE_SV_SEMAPHORE_SIMPLE_H
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#define ACE_SV_SEMAPHORE_SIMPLE_H
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#include /**/ "ace/pre.h"
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#include /**/ "ace/ACE_export.h"
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#if !defined (ACE_LACKS_PRAGMA_ONCE)
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# pragma once
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#endif /* ACE_LACKS_PRAGMA_ONCE */
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#include "ace/os_include/sys/os_stat.h"
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#include "ace/os_include/sys/os_ipc.h"
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#include "ace/os_include/sys/os_sem.h"
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#include "ace/Default_Constants.h"
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#if defined (ACE_WIN32)
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// Default semaphore key and mutex name
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# if !defined (ACE_DEFAULT_SEM_KEY)
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# define ACE_DEFAULT_SEM_KEY const_cast <char*>("ACE_SEM_KEY")
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# endif /* ACE_DEFAULT_SEM_KEY */
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#else /* !defined (ACE_WIN32) */
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// Default semaphore key
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# if !defined (ACE_DEFAULT_SEM_KEY)
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# define ACE_DEFAULT_SEM_KEY 1234
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# endif /* ACE_DEFAULT_SEM_KEY */
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#endif /* ACE_WIN32 */
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ACE_BEGIN_VERSIONED_NAMESPACE_DECL
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/**
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* @class ACE_SV_Semaphore_Simple
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*
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* @brief This is a simple semaphore package that assumes there are
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* no race conditions for initialization (i.e., the order of
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* process startup must be well defined).
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*/
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class ACE_Export ACE_SV_Semaphore_Simple
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{
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public:
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enum
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{
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ACE_CREATE = IPC_CREAT,
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ACE_EXCL = IPC_EXCL,
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ACE_OPEN = 0
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};
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// = Initialization and termination methods.
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ACE_SV_Semaphore_Simple (void);
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ACE_SV_Semaphore_Simple (key_t key,
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short flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
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int initial_value = 1,
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u_short nsems = 1,
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mode_t perms = ACE_DEFAULT_FILE_PERMS);
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ACE_SV_Semaphore_Simple (const char *name,
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short flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
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int initial_value = 1,
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u_short nsems = 1,
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mode_t perms = ACE_DEFAULT_FILE_PERMS);
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#if defined (ACE_HAS_WCHAR)
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ACE_SV_Semaphore_Simple (const wchar_t *name,
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short flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
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int initial_value = 1,
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u_short nsems = 1,
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mode_t perms = ACE_DEFAULT_FILE_PERMS);
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#endif /* ACE_HAS_WCHAR */
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~ACE_SV_Semaphore_Simple (void);
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int open (const char *name,
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short flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
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int initial_value = 1,
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u_short nsems = 1,
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mode_t perms = ACE_DEFAULT_FILE_PERMS);
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#if defined (ACE_HAS_WCHAR)
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int open (const wchar_t *name,
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short flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
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int initial_value = 1,
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u_short nsems = 1,
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mode_t perms = ACE_DEFAULT_FILE_PERMS);
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#endif /* ACE_HAS_WCHAR */
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/// Open or create one or more SV_Semaphores. We return 0 if all is
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/// OK, else -1.
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int open (key_t key,
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short flags = ACE_SV_Semaphore_Simple::ACE_CREATE,
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int initial_value = 1,
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u_short nsems = 1,
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mode_t perms = ACE_DEFAULT_FILE_PERMS);
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/// Close a ACE_SV_Semaphore, marking it as invalid for subsequent
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/// operations...
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int close (void);
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/**
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* Remove all SV_Semaphores associated with a particular key. This
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* call is intended to be called from a server, for example, when it
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* is being shut down, as we do an IPC_RMID on the ACE_SV_Semaphore,
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* regardless of whether other processes may be using it or not.
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* Most other processes should use close() below.
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*/
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int remove (void) const;
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// = Semaphore acquire and release methods.
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/**
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* Wait until a ACE_SV_Semaphore's value is greater than 0, the
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* decrement it by 1 and return. Dijkstra's P operation, Tannenbaums
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* DOWN operation.
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*/
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int acquire (u_short n = 0, short flags = 0) const;
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/// Acquire a semaphore for reading.
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int acquire_read (u_short n = 0, short flags = 0) const;
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/// Acquire a semaphore for writing
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int acquire_write (u_short n = 0, short flags = 0) const;
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/// Non-blocking version of <acquire>.
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int tryacquire (u_short n = 0, short flags = 0) const;
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/// Try to acquire the semaphore for reading.
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int tryacquire_read (u_short n = 0, short flags = 0) const;
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/// Try to acquire the semaphore for writing.
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int tryacquire_write (u_short n = 0, short flags = 0) const;
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/// Increment ACE_SV_Semaphore by one. Dijkstra's V operation,
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/// Tannenbaums UP operation.
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int release (u_short n = 0, short flags = 0) const;
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// = Semaphore operation methods.
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/// General ACE_SV_Semaphore operation. Increment or decrement by a
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/// specific amount (positive or negative; amount can`t be zero).
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int op (short val, u_short semnum = 0, short flags = SEM_UNDO) const;
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/// General ACE_SV_Semaphore operation on an array of SV_Semaphores.
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int op (sembuf op_vec[], u_short nsems) const;
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// = Semaphore control methods.
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int control (int cmd, semun arg, u_short n = 0) const;
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int control (int cmd, int value = 0, u_short n = 0) const;
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/// Get underlying internal id.
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int get_id (void) const;
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/// Dump the state of an object.
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void dump (void) const;
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/// Declare the dynamic allocation hooks.
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ACE_ALLOC_HOOK_DECLARE;
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protected:
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/// Semaphore key.
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key_t key_;
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/// Internal ID to identify the semaphore group within this process.
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int internal_id_;
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/// Number of semaphores we're creating.
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int sem_number_;
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/**
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* Convert name to key This function is used internally to create
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* keys for the semaphores. A valid name contains letters and
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* digits only and MUST start with a letter.
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*
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* The method for generating names is not very sophisticated, so
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* caller should not pass strings which match each other for the first
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* LUSED characters when he wants to get a different key.
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*/
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int init (key_t k = static_cast<key_t> (ACE_INVALID_SEM_KEY),
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int i = -1);
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key_t name_2_key (const char *name);
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};
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ACE_END_VERSIONED_NAMESPACE_DECL
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#if defined (__ACE_INLINE__)
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#include "ace/SV_Semaphore_Simple.inl"
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#endif /* __ACE_INLINE__ */
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#include /**/ "ace/post.h"
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#endif /* _SV_SEMAPHORE_SIMPLE_H */
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