/usr/include/codeblocks/cbthreadpool.h is in codeblocks-dev 10.05-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 | /*
* This file is part of the Code::Blocks IDE and licensed under the GNU Lesser General Public License, version 3
* http://www.gnu.org/licenses/lgpl-3.0.html
*/
#ifndef CBTHREADPOOL_H
#define CBTHREADPOOL_H
#include <wx/thread.h>
#include <wx/event.h>
#include <vector>
#include <list>
#include "cbthreadedtask.h"
#include "settings.h"
// -------------------------------------------------------------------
// Determine if a GNU compiler with version less than 3.4 is being used
// -------------------------------------------------------------------
#ifdef __GNUC__
#if ( (__GNUC__ < 3) || ( (__GNUC__ == 3) && (__GNUC_MINOR__ < 4) ) )
#define GCC_LT_34
#endif
#endif // __GNUC__
#ifdef GCC_LT_34
class cbThreadPool;
#include "cbthreadpool_extras.h"
#define QUALIFY_IF_GCC_GE_34(x)
#else
#define QUALIFY_IF_GCC_GE_34(x) x
#endif
/// A Thread Pool implementation
class DLLIMPORT cbThreadPool
{
public:
/** cbThreadPool ctor
*
* @param owner Event handler to receive cbEVT_THREADTASK_ENDED and cbEVT_THREADTASK_ALLDONE events
* @param id Used with the events
* @param concurrentThreads Number of threads in the pool. -1 means current CPU count
*/
cbThreadPool(wxEvtHandler *owner, int id = -1, int concurrentThreads = -1);
/// cbThreadPool dtor
~cbThreadPool();
/** Changes the number of threads in the pool
*
* @param concurrentThreads New number of threads. -1 means current CPU count
* @note If tasks are running, it'll delay it until they're all done.
*/
void SetConcurrentThreads(int concurrentThreads);
/** Gets the current number of threads in the pool
*
* @return Number of threads in the pool
* @note If a call to SetConcurrentThreads hasn't been applied, it'll return the
* number of threads that will be set by it when all tasks be done.
*/
int GetConcurrentThreads() const;
/** Adds a new task to the pool
*
* @param task The task to execute
* @param autodelete If true, the task will be deleted when it finish or be aborted
*/
void AddTask(cbThreadedTask *task, bool autodelete = true);
/** Aborts all running and pending tasks
*
* @note Calls cbThreadedTask::Abort for all running tasks and just removes the pending ones.
*/
void AbortAllTasks();
/** Tells if the pool has finished its job
*
* @return true if it has nothing to do, false if it's executing tasks
*/
bool Done() const;
/** Begin a batch process
*
* @note EVIL: Call it if you want to add all tasks first and get none executed yet.
* If you DON'T call it, taks will be executed as you add them (in fact it's what
* one would expect).
*/
void BatchBegin();
/** End a batch process
*
* @note EVIL: Call it when you have finished adding tasks and want them to execute.
* BEWARE: if you call BatchBegin but DON'T call BatchEnd, the tasks WON'T execute.
*/
void BatchEnd();
private:
#ifndef GCC_LT_34
#include "cbthreadpool_extras.h"
#endif
typedef std::vector<cbWorkerThread *> WorkerThreadsArray;
/// All tasks are added to one of these. It'll also save the autodelete value
struct cbThreadedTaskElement
{
cbThreadedTaskElement(cbThreadedTask *_task = 0, bool _autodelete = false)
: task(_task),
autodelete(_autodelete)
{
// empty
}
/// It'll delete the task only if it was set to
void Delete()
{
if (autodelete)
{
delete task;
task = 0; // better safe than sorry
}
}
cbThreadedTask *task;
bool autodelete;
};
typedef std::list<cbThreadedTaskElement> TasksQueue;
wxEvtHandler *m_pOwner;
int m_ID;
bool m_batching;
int m_concurrentThreads; // current number of concurrent threads
int m_concurrentThreadsSchedule; // if we cannot apply the new value of concurrent threads, keep it here
WorkerThreadsArray m_threads; // the working threads are stored here
TasksQueue m_tasksQueue; // and the pending tasks here
int m_workingThreads; // how many working threads are running a task
mutable wxMutex m_Mutex; // we better be safe
CountedPtr<wxSemaphore> m_semaphore; // used to synchronise the Worker Threads
void _SetConcurrentThreads(int concurrentThreads); // like SetConcurrentThreads, but non-thread safe
void Broadcast(); // awakes all threads
void AwakeNeeded(); // awakes only a few threads
protected:
friend class cbWorkerThread;
/** Returns the next task to run
*
* @return Next task to run, or a NULL task (set in .task) if none
*/
cbThreadedTaskElement GetNextTask();
/// Mechanism for the threads to tell the Pool they're running
void WorkingThread();
/** Mechanism for the threads to tell the Pool they're done and will wait
*
* @return true if everything is OK, false if we should abort
*/
bool WaitingThread();
/** Called by a Worker Thread to inform a task has finished
*
* @param thread The Worker Thread
*/
void TaskDone(cbWorkerThread *thread);
};
/* ************************************************ */
/* **************** INLINE MEMBERS **************** */
/* ************************************************ */
inline cbThreadPool::cbThreadPool(wxEvtHandler *owner, int id, int concurrentThreads)
: m_pOwner(owner),
m_ID(id),
m_batching(false),
m_concurrentThreads(-1),
m_concurrentThreadsSchedule(0),
m_workingThreads(0),
m_semaphore(new wxSemaphore)
{
SetConcurrentThreads(concurrentThreads);
}
inline int cbThreadPool::GetConcurrentThreads() const
{
wxMutexLocker lock(m_Mutex);
return m_concurrentThreadsSchedule ? m_concurrentThreadsSchedule : m_concurrentThreads;
}
inline bool cbThreadPool::Done() const
{
wxMutexLocker lock(m_Mutex);
return m_workingThreads == 0;
}
inline void cbThreadPool::BatchBegin()
{
wxMutexLocker lock(m_Mutex);
m_batching = true;
}
inline void cbThreadPool::Broadcast()
{
if (m_concurrentThreads == -1)
{
return;
}
for (std::size_t i = 0; i < static_cast<std::size_t>(m_concurrentThreads - m_workingThreads); ++i)
{
m_semaphore->Post();
}
}
inline void cbThreadPool::AwakeNeeded()
{
if (m_concurrentThreads == -1)
{
return;
}
for (std::size_t i = 0; i < m_tasksQueue.size(); ++i)
{
m_semaphore->Post();
}
}
/* *** Josuttis' CountedPtr *** */
template <typename T>
inline QUALIFY_IF_GCC_GE_34(cbThreadPool::)CountedPtr<T>::CountedPtr(T *p)
: ptr(p),
count(new long(1))
{
// empty
}
template <typename T>
inline QUALIFY_IF_GCC_GE_34(cbThreadPool::)CountedPtr<T>::CountedPtr(const CountedPtr<T> &p) throw()
: ptr(p.ptr),
count(p.count)
{
++*count;
}
template <typename T>
inline QUALIFY_IF_GCC_GE_34(cbThreadPool::)CountedPtr<T>::~CountedPtr() throw()
{
dispose();
}
template <typename T>
inline QUALIFY_IF_GCC_GE_34(cbThreadPool::)CountedPtr<T> &QUALIFY_IF_GCC_GE_34(cbThreadPool::)CountedPtr<T>::operator = (const CountedPtr<T> &p) throw()
{
if (this != &p)
{
dispose();
ptr = p.ptr;
count = p.count;
++*count;
}
return *this;
}
template <typename T>
inline T &QUALIFY_IF_GCC_GE_34(cbThreadPool::)CountedPtr<T>::operator * () const throw()
{
return *ptr;
}
template <typename T>
inline T *QUALIFY_IF_GCC_GE_34(cbThreadPool::)CountedPtr<T>::operator -> () const throw()
{
return ptr;
}
template <typename T>
inline void QUALIFY_IF_GCC_GE_34(cbThreadPool::)CountedPtr<T>::dispose()
{
if (--*count == 0)
{
delete count;
delete ptr;
}
}
#endif //CBTHREADPOOL_H
|