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Define an RAII wrapper for the Win32 HANDLE type and make sure all handles created also get closed in the DSound2 audio player. Updates #1145. 

Originally committed to SVN as r4084.
This commit is contained in:
Niels Martin Hansen 2010-02-05 15:13:11 +00:00
parent 702739b32e
commit 6fe0eb96be
1 changed files with 45 additions and 21 deletions
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66
aegisub/src/audio_player_dsound2.cpp
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@ -1,4 +1,4 @@
// Copyright (c) 2008, Niels Martin Hansen
// Copyright (c) 2008, 2010, Niels Martin Hansen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
@ -55,6 +55,7 @@
#include "utils.h"
/// @brief RAII support class to init and de-init the COM library
struct COMInitialization {
@ -89,6 +90,7 @@ struct COMInitialization {
};
/// @class COMObjectRetainer
/// @brief Simple auto_ptr-like class for COM objects
template<class T>
@ -130,6 +132,30 @@ struct COMObjectRetainer {
/// @brief RAII wrapper around Win32 HANDLE type
struct Win32KernelHandle {
/// HANDLE value being managed
HANDLE handle;
/// @brief Create with a managed handle
/// @param handle Win32 handle to manage
Win32KernelHandle(HANDLE handle = 0)
: handle(handle)
{
}
/// @brief Destructor, closes the managed handle
~Win32KernelHandle()
{
if (handle) CloseHandle(handle);
}
/// @brief Returns the managed handle
operator HANDLE () const { return handle; }
};
/// @class DirectSoundPlayer2Thread
/// @brief Playback thread class for DirectSoundPlayer2
///
@ -144,31 +170,31 @@ class DirectSoundPlayer2Thread {
/// Win32 handle to the thread
HANDLE thread_handle;
Win32KernelHandle thread_handle;
/// Event object, world to thread, set to start playback
HANDLE event_start_playback;
Win32KernelHandle event_start_playback;
/// Event object, world to thread, set to stop playback
HANDLE event_stop_playback;
Win32KernelHandle event_stop_playback;
/// Event object, world to thread, set if playback end time was updated
HANDLE event_update_end_time;
Win32KernelHandle event_update_end_time;
/// Event object, world to thread, set if the volume was changed
HANDLE event_set_volume;
Win32KernelHandle event_set_volume;
/// Event object, world to thread, set if the thread should end as soon as possible
HANDLE event_kill_self;
Win32KernelHandle event_kill_self;
/// Event object, thread to world, set when the thread has entered its main loop
HANDLE thread_running;
Win32KernelHandle thread_running;
/// Event object, thread to world, set when playback is ongoing
HANDLE is_playing;
Win32KernelHandle is_playing;
/// Event object, thread to world, set if an error state has occurred (implies thread is dying)
HANDLE error_happened;
Win32KernelHandle error_happened;
/// Statically allocated error message text describing reason for error_happened being set
const wxChar *error_message;
@ -636,17 +662,15 @@ void DirectSoundPlayer2Thread::CheckError()
/// @param _WantedLatency Desired length in milliseconds to write ahead of the playback cursor
/// @param _BufferLength Multiplier for WantedLatency to get total buffer length
DirectSoundPlayer2Thread::DirectSoundPlayer2Thread(AudioProvider *provider, int _WantedLatency, int _BufferLength)
: event_start_playback (CreateEvent(0, FALSE, FALSE, 0))
, event_stop_playback (CreateEvent(0, FALSE, FALSE, 0))
, event_update_end_time (CreateEvent(0, FALSE, FALSE, 0))
, event_set_volume (CreateEvent(0, FALSE, FALSE, 0))
, event_kill_self (CreateEvent(0, FALSE, FALSE, 0))
, thread_running (CreateEvent(0, TRUE, FALSE, 0))
, is_playing (CreateEvent(0, TRUE, FALSE, 0))
, error_happened (CreateEvent(0, FALSE, FALSE, 0))
{
event_start_playback = CreateEvent(0, FALSE, FALSE, 0);
event_stop_playback = CreateEvent(0, FALSE, FALSE, 0);
event_update_end_time = CreateEvent(0, FALSE, FALSE, 0);
event_set_volume = CreateEvent(0, FALSE, FALSE, 0);
event_kill_self = CreateEvent(0, FALSE, FALSE, 0);
thread_running = CreateEvent(0, TRUE, FALSE, 0);
is_playing = CreateEvent(0, TRUE, FALSE, 0);
error_happened = CreateEvent(0, FALSE, FALSE, 0);
error_message = 0;
volume = 1.0;
start_frame = 0;
@ -657,7 +681,7 @@ DirectSoundPlayer2Thread::DirectSoundPlayer2Thread(AudioProvider *provider, int
this->provider = provider;
thread_handle = (HANDLE)_beginthreadex(0, 0, ThreadProc, this, 0, 0);
thread_handle.handle = (HANDLE)_beginthreadex(0, 0, ThreadProc, this, 0, 0);
if (!thread_handle)
throw _T("Failed creating playback thread in DirectSoundPlayer2. This is bad.");