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https://github.com/Telecominfraproject/wlan-cloud-lib-poco.git
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331 lines
8.2 KiB
C++
331 lines
8.2 KiB
C++
//
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// Thread.h
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//
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// $Id: //poco/1.4/Foundation/include/Poco/Thread.h#3 $
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//
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// Library: Foundation
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// Package: Threading
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// Module: Thread
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//
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// Definition of the Thread class.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_Thread_INCLUDED
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#define Foundation_Thread_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/Mutex.h"
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#if defined(POCO_OS_FAMILY_WINDOWS)
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#if defined(_WIN32_WCE)
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#include "Poco/Thread_WINCE.h"
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#else
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#include "Poco/Thread_WIN32.h"
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#endif
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#elif defined(POCO_VXWORKS)
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#include "Poco/Thread_VX.h"
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#else
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#include "Poco/Thread_POSIX.h"
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#endif
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namespace Poco {
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class Runnable;
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class ThreadLocalStorage;
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class Foundation_API Thread: private ThreadImpl
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/// This class implements a platform-independent
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/// wrapper to an operating system thread.
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///
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/// Every Thread object gets a unique (within
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/// its process) numeric thread ID.
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/// Furthermore, a thread can be assigned a name.
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/// The name of a thread can be changed at any time.
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{
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public:
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typedef ThreadImpl::TIDImpl TID;
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using ThreadImpl::Callable;
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enum Priority
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/// Thread priorities.
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{
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PRIO_LOWEST = PRIO_LOWEST_IMPL, /// The lowest thread priority.
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PRIO_LOW = PRIO_LOW_IMPL, /// A lower than normal thread priority.
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PRIO_NORMAL = PRIO_NORMAL_IMPL, /// The normal thread priority.
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PRIO_HIGH = PRIO_HIGH_IMPL, /// A higher than normal thread priority.
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PRIO_HIGHEST = PRIO_HIGHEST_IMPL /// The highest thread priority.
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};
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enum Policy
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{
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POLICY_DEFAULT = POLICY_DEFAULT_IMPL
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};
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Thread();
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/// Creates a thread. Call start() to start it.
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Thread(const std::string& name);
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/// Creates a named thread. Call start() to start it.
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~Thread();
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/// Destroys the thread.
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int id() const;
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/// Returns the unique thread ID of the thread.
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TID tid() const;
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/// Returns the native thread ID of the thread.
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std::string name() const;
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/// Returns the name of the thread.
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std::string getName() const;
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/// Returns the name of the thread.
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void setName(const std::string& name);
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/// Sets the name of the thread.
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void setPriority(Priority prio);
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/// Sets the thread's priority.
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///
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/// Some platform only allow changing a thread's priority
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/// if the process has certain privileges.
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Priority getPriority() const;
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/// Returns the thread's priority.
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void setOSPriority(int prio, int policy = POLICY_DEFAULT);
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/// Sets the thread's priority, using an operating system specific
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/// priority value. Use getMinOSPriority() and getMaxOSPriority() to
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/// obtain mininum and maximum priority values. Additionally,
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/// a scheduling policy can be specified. The policy is currently
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/// only used on POSIX platforms where the values SCHED_OTHER (default),
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/// SCHED_FIFO and SCHED_RR are supported.
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int getOSPriority() const;
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/// Returns the thread's priority, expressed as an operating system
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/// specific priority value.
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///
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/// May return 0 if the priority has not been explicitly set.
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static int getMinOSPriority(int policy = POLICY_DEFAULT);
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/// Returns the mininum operating system-specific priority value,
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/// which can be passed to setOSPriority() for the given policy.
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static int getMaxOSPriority(int policy = POLICY_DEFAULT);
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/// Returns the maximum operating system-specific priority value,
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/// which can be passed to setOSPriority() for the given policy.
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void setStackSize(int size);
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/// Sets the thread's stack size in bytes.
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/// Setting the stack size to 0 will use the default stack size.
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/// Typically, the real stack size is rounded up to the nearest
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/// page size multiple.
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int getStackSize() const;
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/// Returns the thread's stack size in bytes.
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/// If the default stack size is used, 0 is returned.
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void start(Runnable& target);
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/// Starts the thread with the given target.
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///
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/// Note that the given Runnable object must remain
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/// valid during the entire lifetime of the thread, as
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/// only a reference to it is stored internally.
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void start(Callable target, void* pData = 0);
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/// Starts the thread with the given target and parameter.
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void join();
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/// Waits until the thread completes execution.
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/// If multiple threads try to join the same
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/// thread, the result is undefined.
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void join(long milliseconds);
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/// Waits for at most the given interval for the thread
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/// to complete. Throws a TimeoutException if the thread
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/// does not complete within the specified time interval.
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bool tryJoin(long milliseconds);
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/// Waits for at most the given interval for the thread
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/// to complete. Returns true if the thread has finished,
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/// false otherwise.
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bool isRunning() const;
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/// Returns true if the thread is running.
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static void sleep(long milliseconds);
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/// Suspends the current thread for the specified
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/// amount of time.
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static void yield();
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/// Yields cpu to other threads.
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static Thread* current();
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/// Returns the Thread object for the currently active thread.
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/// If the current thread is the main thread, 0 is returned.
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static TID currentTid();
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/// Returns the native thread ID for the current thread.
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protected:
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ThreadLocalStorage& tls();
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/// Returns a reference to the thread's local storage.
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void clearTLS();
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/// Clears the thread's local storage.
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std::string makeName();
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/// Creates a unique name for a thread.
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static int uniqueId();
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/// Creates and returns a unique id for a thread.
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private:
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Thread(const Thread&);
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Thread& operator = (const Thread&);
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int _id;
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std::string _name;
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ThreadLocalStorage* _pTLS;
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mutable FastMutex _mutex;
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friend class ThreadLocalStorage;
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friend class PooledThread;
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};
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//
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// inlines
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//
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inline Thread::TID Thread::tid() const
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{
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return tidImpl();
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}
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inline int Thread::id() const
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{
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return _id;
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}
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inline std::string Thread::name() const
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{
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FastMutex::ScopedLock lock(_mutex);
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return _name;
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}
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inline std::string Thread::getName() const
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{
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FastMutex::ScopedLock lock(_mutex);
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return _name;
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}
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inline bool Thread::isRunning() const
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{
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return isRunningImpl();
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}
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inline void Thread::sleep(long milliseconds)
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{
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sleepImpl(milliseconds);
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}
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inline void Thread::yield()
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{
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yieldImpl();
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}
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inline Thread* Thread::current()
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{
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return static_cast<Thread*>(currentImpl());
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}
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inline void Thread::setOSPriority(int prio, int policy)
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{
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setOSPriorityImpl(prio, policy);
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}
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inline int Thread::getOSPriority() const
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{
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return getOSPriorityImpl();
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}
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inline int Thread::getMinOSPriority(int policy)
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{
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return ThreadImpl::getMinOSPriorityImpl(policy);
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}
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inline int Thread::getMaxOSPriority(int policy)
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{
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return ThreadImpl::getMaxOSPriorityImpl(policy);
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}
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inline void Thread::setStackSize(int size)
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{
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setStackSizeImpl(size);
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}
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inline int Thread::getStackSize() const
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{
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return getStackSizeImpl();
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}
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inline Thread::TID Thread::currentTid()
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{
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return currentTidImpl();
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}
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} // namespace Poco
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#endif // Foundation_Thread_INCLUDED
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