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Diffstat (limited to '')
| -rw-r--r-- | include/osl/conditn.h | 97 | ||||
| -rw-r--r-- | include/osl/conditn.hxx | 168 |
2 files changed, 265 insertions, 0 deletions
diff --git a/include/osl/conditn.h b/include/osl/conditn.h new file mode 100644 index 000000000..785834bb1 --- /dev/null +++ b/include/osl/conditn.h @@ -0,0 +1,97 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_OSL_CONDITN_H +#define INCLUDED_OSL_CONDITN_H + +#include "sal/config.h" + +#include "osl/time.h" +#include "sal/saldllapi.h" + +#ifdef __cplusplus +extern "C" { +#endif + +typedef void* oslCondition; + +typedef enum { + osl_cond_result_ok, /*<! Successful completion. */ + osl_cond_result_error, /*<! Error occurred. @see osl_getLastSocketError() */ + osl_cond_result_timeout, /*<! Blocking operation timed out. */ + osl_cond_result_FORCE_EQUAL_SIZE = SAL_MAX_ENUM +} oslConditionResult; + +/** Creates a condition. + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + + The condition is in the reset-state. + + @retval osl_cond_result_error Condition could not be created. +*/ +SAL_DLLPUBLIC oslCondition SAL_CALL osl_createCondition(void); + +/** Free the memory used by the condition. + + @param Condition the condition handle. +*/ +SAL_DLLPUBLIC void SAL_CALL osl_destroyCondition(oslCondition Condition); + +/** Sets condition to True => wait() will not block, check() returns True. + + @attention @em all threads waiting on this condition are unblocked! + + @param Condition handle to a created condition. + @retval False if system-call failed. +*/ +SAL_DLLPUBLIC sal_Bool SAL_CALL osl_setCondition(oslCondition Condition); + +/** Sets condition to False => wait() will block, check() returns False + + @param Condition handle to a created condition. + @retval False if system-call failed. +*/ +SAL_DLLPUBLIC sal_Bool SAL_CALL osl_resetCondition(oslCondition Condition); + +/** Blocks if condition is not set. + + @param Condition handle to a created condition. + @param pTimeout Timeout value or NULL for infinite waiting + @retval False Condition has been destroyed prematurely or system call has failed. +*/ +SAL_DLLPUBLIC oslConditionResult SAL_CALL osl_waitCondition(oslCondition Condition, const TimeValue* pTimeout); + +/** Queries the state of the condition without blocking. + + @param Condition handle to a created condition. + + @retval True condition is set + @retval False condition is not set +*/ +SAL_DLLPUBLIC sal_Bool SAL_CALL osl_checkCondition(oslCondition Condition); + +#ifdef __cplusplus +} +#endif + +#endif // INCLUDED_OSL_CONDITN_H + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ diff --git a/include/osl/conditn.hxx b/include/osl/conditn.hxx new file mode 100644 index 000000000..7bb09d573 --- /dev/null +++ b/include/osl/conditn.hxx @@ -0,0 +1,168 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_OSL_CONDITN_HXX +#define INCLUDED_OSL_CONDITN_HXX + +#include "sal/config.h" + +#include <cstddef> + +#include "osl/time.h" +#include "osl/conditn.h" + +#if defined(MACOSX) && defined(__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES) +# if __ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES == 1 +# undef check +# endif +#endif + +namespace osl +{ + /** Condition variable + + A condition variable is essentially an object that is initially + cleared which a thread waits on until it is "set". It allows a + thread to synchronize execution by allowing other threads to wait + for the condition to change before that thread then continues + execution. + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + + @attention Warning: the Condition abstraction is inadequate for + any situation where there may be multiple threads setting, + waiting, and resetting the same condition. It can only be + used to synchronise interactions between two threads + cf. lost wakeups in http://www.cs.wustl.edu/~schmidt/win32-cv-1.html + */ + class Condition + { + public: + enum Result + { + result_ok = osl_cond_result_ok, /*!< Successful completion. */ + result_error = osl_cond_result_error, /*!< Error occurred. @see osl_getLastSocketError() */ + result_timeout = osl_cond_result_timeout /*!< Blocking operation timed out. */ + }; + + /** Create a condition. + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + */ + Condition() + { + condition = osl_createCondition(); + } + + /** Release the OS-structures and free condition data-structure. + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + */ + ~Condition() + { + osl_destroyCondition(condition); + } + + /** Release all waiting threads, check returns true. + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + */ + void set() + { + osl_setCondition(condition); + } + + /** Reset condition to false: wait() will block, check() returns + false. + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + */ + void reset() { + osl_resetCondition(condition); + } + + /** Blocks the calling thread until condition is set. + + @param [in] pTimeout Timeout to wait before ending the condition. + Defaults to NULL + + @retval result_ok finished successfully + @retval result_error error occurred + @retval result_timeout timed out + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + */ + Result wait(const TimeValue *pTimeout = NULL) + { + return static_cast<Result>(osl_waitCondition(condition, pTimeout)); + } + +#if defined LIBO_INTERNAL_ONLY + Result wait(TimeValue const & timeout) { return wait(&timeout); } +#endif + + /** Checks if the condition is set without blocking. + + @retval true condition is set + @retval false condition is not set + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + */ + bool check() + { + return osl_checkCondition(condition); + } + + + private: + oslCondition condition; /*< condition variable */ + + /** Copy constructor + + The underlying oslCondition has no reference count. + + Since the underlying oslCondition is not a reference counted + object, copy constructed Condition may work on an already + destructed oslCondition object. + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + */ + Condition(const Condition& condition) SAL_DELETED_FUNCTION; + + /** This assignment operator is deleted for the same reason as + the copy constructor. + + @deprecated use C++11's std::condition_variable instead + for a more robust and helpful condition. + */ + Condition& operator= (const Condition&) SAL_DELETED_FUNCTION; + }; +} + +#endif // INCLUDED_OSL_CONDITN_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |