pcsx2/plugins/LilyPad/WndProcEater.cpp

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#include "WndProcEater.h"
static HWND hWndEaten = 0;
static WNDPROC eatenWndProc = 0;
struct ExtraWndProcInfo {
ExtraWndProc proc;
DWORD flags;
};
static ExtraWndProcInfo* extraProcs = 0;
static int numExtraProcs = 0;
void ReleaseExtraProc(ExtraWndProc proc) {
// Probably isn't needed, but just in case...
// Creating and destroying the mutex adds some inefficiency,
// but this function is only called on emulation start and on focus/unfocus.
HANDLE hMutex = CreateMutexA(0, 0, "LilyPad");
if (hMutex) WaitForSingleObject(hMutex, 100);
for (int i=0; i<numExtraProcs; i++) {
if (extraProcs[i].proc == proc) {
extraProcs[i] = extraProcs[--numExtraProcs];
break;
}
}
if (!numExtraProcs && eatenWndProc) {
free(extraProcs);
extraProcs = 0;
if (hWndEaten && IsWindow(hWndEaten)) {
SetWindowLongPtr(hWndEaten, GWLP_WNDPROC, (LONG_PTR)eatenWndProc);
}
hWndEaten = 0;
eatenWndProc = 0;
}
if (hMutex) {
ReleaseMutex(hMutex);
CloseHandle(hMutex);
}
}
void ReleaseEatenProc() {
while (numExtraProcs) ReleaseExtraProc(extraProcs[0].proc);
}
extern int deviceUpdateQueued;
LRESULT CALLBACK OverrideWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
ExtraWndProcResult res = CONTINUE_BLISSFULLY;
LRESULT out = 0;
// Here because want it for binding, even when no keyboard mode is selected.
if (uMsg == WM_GETDLGCODE) {
return DLGC_WANTALLKEYS | CallWindowProc(eatenWndProc, hWnd, uMsg, wParam, lParam);
}
for (int i=0; i<numExtraProcs; i++) {
// Note: Second bit of deviceUpdateQueued is only set when I receive a device change
// notification, which is handled in the GS thread in one of the extraProcs, so this
// is all I need to prevent bad things from happening while updating devices. No mutex needed.
if ((deviceUpdateQueued&2) && (extraProcs[i].flags & EATPROC_NO_UPDATE_WHILE_UPDATING_DEVICES)) continue;
ExtraWndProcResult res2 = extraProcs[i].proc(hWnd, uMsg, wParam, lParam, &out);
if (res2 != res) {
if (res2 == CONTINUE_BLISSFULLY_AND_RELEASE_PROC) {
ReleaseExtraProc(extraProcs[i].proc);
i--;
}
else if (res2 > res) res = res2;
}
}
if (res != NO_WND_PROC) {
if (out == WM_DESTROY) {
ReleaseEatenProc();
}
if (res == CONTINUE_BLISSFULLY)
out = CallWindowProc(eatenWndProc, hWnd, uMsg, wParam, lParam);
else if (res == USE_DEFAULT_WND_PROC)
out = DefWindowProc(hWnd, uMsg, wParam, lParam);
}
return out;
}
int EatWndProc(HWND hWnd, ExtraWndProc proc, DWORD flags) {
// Probably isn't needed, but just in case...
// Creating and destroying the mutex adds some inefficiency,
// but this function is only called on emulation start and on focus/unfocus.
HANDLE hMutex = CreateMutexA(0, 0, "LilyPad");
if (hMutex) WaitForSingleObject(hMutex, 100);
if (hWnd != hWndEaten) {
ReleaseEatenProc();
eatenWndProc = (WNDPROC) SetWindowLongPtr(hWnd, GWLP_WNDPROC, (LONG_PTR)OverrideWndProc);
// ???
if (eatenWndProc)
hWndEaten = hWnd;
}
if (hWndEaten == hWnd) {
extraProcs = (ExtraWndProcInfo*) realloc(extraProcs, sizeof(ExtraWndProcInfo)*(numExtraProcs+1));
extraProcs[numExtraProcs].proc = proc;
extraProcs[numExtraProcs].flags = flags;
numExtraProcs++;
}
if (hMutex) {
ReleaseMutex(hMutex);
CloseHandle(hMutex);
}
return hWndEaten == hWnd;
}