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#pragma once
#include <windows.h>
#include <bfc/platform/types.h>
#include <bfc/dispatch.h>
class ThreadID;
class api_threadpool : public Dispatchable
{
protected:
api_threadpool() {}
~api_threadpool() {}
public:
typedef int (*ThreadPoolFunc)(HANDLE handle, void *user_data, intptr_t id);
enum
{
// pass this flag to AddHandle or RunFunction indicate that your thread function
// might run for a long time
FLAG_LONG_EXECUTION = 0x1,
FLAG_REQUIRE_COM_STA = 0x2,
FLAG_REQUIRE_COM_MT = 0x4,
MASK_COM_FLAGS = 0x6,
};
public:
ThreadID *ReserveThread(int flags);
/* Release a thread you've previously reserved */
void ReleaseThread(ThreadID *thread_id);
/* adds a waitable handle to the thread pool. when the event is signalled, your function ptr will get called
user_data and id values get passed to your function.
your function should return 1 to indicate that it can be removed
flags, see api_threadpool */
int AddHandle(ThreadID *threadid, HANDLE handle, api_threadpool::ThreadPoolFunc func, void *user_data, intptr_t id, int flags);
void RemoveHandle(ThreadID *threadid, HANDLE handle);
int RunFunction(ThreadID *threadid, api_threadpool::ThreadPoolFunc func, void *user_data, intptr_t id, int flags);
size_t GetNumberOfThreads(); // total number of threads in the threadpool
size_t GetNumberOfActiveThreads(); // number of threads that are currently being used (inside user function but not necessarily busy)
enum
{
RESERVETHREAD = 0,
RELEASETHREAD = 1,
ADDHANDLE = 2,
REMOVEHANDLE = 3,
RUNFUNCTION = 4,
GETNUMBEROFTHREADS = 5,
GETNUMBEROFACTIVETHREADS = 6,
};
};
inline ThreadID *api_threadpool::ReserveThread(int flags)
{
return _call(RESERVETHREAD, (ThreadID *)0, flags);
}
inline void api_threadpool::ReleaseThread(ThreadID *thread_id)
{
_voidcall(RELEASETHREAD, thread_id);
}
inline int api_threadpool::AddHandle(ThreadID *threadid, HANDLE handle, api_threadpool::ThreadPoolFunc func, void *user_data, intptr_t id, int flags)
{
return _call(ADDHANDLE, (int)1, threadid, handle, func, user_data, id, flags);
}
inline void api_threadpool::RemoveHandle(ThreadID *threadid, HANDLE handle)
{
_voidcall(REMOVEHANDLE, threadid, handle);
}
inline int api_threadpool::RunFunction(ThreadID *threadid, api_threadpool::ThreadPoolFunc func, void *user_data, intptr_t id, int flags)
{
return _call(RUNFUNCTION, (int)1, threadid, func, user_data, id, flags);
}
inline size_t api_threadpool::GetNumberOfThreads()
{
return _call(GETNUMBEROFTHREADS, (size_t)0);
}
inline size_t api_threadpool::GetNumberOfActiveThreads()
{
return _call(GETNUMBEROFACTIVETHREADS, (size_t)0);
}
// {4DE015D3-11D8-4ac6-A3E6-216DF5252107}
static const GUID ThreadPoolGUID =
{ 0x4de015d3, 0x11d8, 0x4ac6, { 0xa3, 0xe6, 0x21, 0x6d, 0xf5, 0x25, 0x21, 0x7 } };
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