mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-11-28 09:50:47 +01:00
99 lines
3.6 KiB
C++
99 lines
3.6 KiB
C++
#pragma once
|
|
|
|
#include <windows.h>
|
|
#include <bfc/platform/types.h>
|
|
#include <vector>
|
|
#include "../autolock.h"
|
|
#include "ThreadID.h"
|
|
#include "ThreadFunctions.h"
|
|
#include "threadpool_types.h"
|
|
/* random notes
|
|
|
|
HANDLEs common to all threads
|
|
|
|
WaitForMultipleObjectsEx() around these
|
|
0 - killswitch
|
|
1 - shared APC event. since threads might want to use APCs themselves, we'll use a different mechanism (thread-safe FIFO and an event). the intention is that APCs that can go on any thread will use this handle
|
|
2 - per thread APC event.
|
|
|
|
|
|
parameters for "run my function" method
|
|
function pointer, user data, flags
|
|
flags:
|
|
interrupt - for very short non-locking functions where it is safe to interrupt another thread, uses QueueUserAPC
|
|
no_wait - spawn a new thread if all threads are busy
|
|
com_multithreaded - all threads are created with CoInitialize(0), if you need a COINIT_MULTITHREADED thread, use this flag
|
|
|
|
parameters for "add my handle" method
|
|
handle, function pointer, user data, flags
|
|
flags:
|
|
single_thread - only one thread in the pool will wait on your object, useful if your handle is not auto-reset
|
|
|
|
parameters for "function call repeat" - calls your function until you return 0
|
|
function pointer, user data, flags
|
|
flags:
|
|
single_thread - keep calling on the same thread
|
|
*/
|
|
|
|
|
|
class ThreadPool : public api_threadpool
|
|
{
|
|
public:
|
|
static const char *getServiceName() { return "Thread Pool API"; }
|
|
static const GUID getServiceGuid() { return ThreadPoolGUID; }
|
|
public:
|
|
// Owner API:
|
|
ThreadPool();
|
|
void Kill();
|
|
|
|
// User API:
|
|
/* If you have multiple events, APCs, etc and you need them to always run on the same thread
|
|
you can reserve one */
|
|
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)
|
|
|
|
private:
|
|
enum
|
|
{
|
|
TYPE_MT = 0,
|
|
TYPE_STA = 1,
|
|
TYPE_MT_RESERVED = 2,
|
|
TYPE_STA_RESERVED = 3,
|
|
|
|
THREAD_TYPES = 4, // two thread types, single threaded apartment COM and multithreaded COM
|
|
};
|
|
private:
|
|
static DWORD CALLBACK WatchDogThreadProcedure_stub(LPVOID param);
|
|
ThreadID *CreateNewThread_Internal(int thread_type = 0);
|
|
DWORD CALLBACK WatchDogThreadProcedure();
|
|
static int GetThreadType(int flags, int reserved = 0);
|
|
static void GetThreadTypes(int flags, bool types[THREAD_TYPES]);
|
|
void RemoveHandle_Internal(size_t start, HANDLE handle); // recursive helper function for RemoveHandle()
|
|
void AddHandle_Internal(size_t start, HANDLE handle, int flags); // recursive helper function for RemoveHandle()
|
|
|
|
Nullsoft::Utility::LockGuard guard; // guards threads, any_thread_handles, and non_reserved_handles data structures
|
|
typedef std::vector<ThreadID*> ThreadList;
|
|
ThreadList threads;
|
|
ThreadPoolTypes::HandleList any_thread_handles[THREAD_TYPES];
|
|
HANDLE killswitch;
|
|
HANDLE watchdog_thread_handle;
|
|
volatile LONG num_threads_available[THREAD_TYPES];
|
|
ThreadFunctions thread_functions;
|
|
HANDLE max_load_event[THREAD_TYPES];
|
|
protected:
|
|
RECVS_DISPATCH;
|
|
};
|
|
|