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Win32: Remove timeGetTime fallback for timer

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The performance counter API is guaranteed to succeed on Windows XP and
later so there is no need for a fallback.

This removes our last dependency on winmm.

(cherry picked from commit b6834bf2a1)
This commit is contained in:
Camilla Löwy 2021-07-18 21:24:15 +02:00
parent 4ea7485fbe
commit ca676357c0
3 changed files with 4 additions and 44 deletions
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14
src/win32_init.c
View File

@ -72,17 +72,6 @@ BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
//
static GLFWbool loadLibraries(void)
{
_glfw.win32.winmm.instance = LoadLibraryA("winmm.dll");
if (!_glfw.win32.winmm.instance)
{
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
"Win32: Failed to load winmm.dll");
return GLFW_FALSE;
}
_glfw.win32.winmm.GetTime = (PFN_timeGetTime)
GetProcAddress(_glfw.win32.winmm.instance, "timeGetTime");
_glfw.win32.user32.instance = LoadLibraryA("user32.dll");
if (!_glfw.win32.user32.instance)
{
@ -180,9 +169,6 @@ static void freeLibraries(void)
if (_glfw.win32.dinput8.instance)
FreeLibrary(_glfw.win32.dinput8.instance);
if (_glfw.win32.winmm.instance)
FreeLibrary(_glfw.win32.winmm.instance);
if (_glfw.win32.user32.instance)
FreeLibrary(_glfw.win32.user32.instance);

10
src/win32_platform.h
View File

@ -218,10 +218,6 @@ typedef enum
#define DIDFT_OPTIONAL 0x80000000
#endif
// winmm.dll function pointer typedefs
typedef DWORD (WINAPI * PFN_timeGetTime)(void);
#define timeGetTime _glfw.win32.winmm.GetTime
// xinput.dll function pointer typedefs
typedef DWORD (WINAPI * PFN_XInputGetCapabilities)(DWORD,DWORD,XINPUT_CAPABILITIES*);
typedef DWORD (WINAPI * PFN_XInputGetState)(DWORD,XINPUT_STATE*);
@ -350,11 +346,6 @@ typedef struct _GLFWlibraryWin32
int rawInputSize;
UINT mouseTrailSize;
struct {
HINSTANCE instance;
PFN_timeGetTime GetTime;
} winmm;
struct {
HINSTANCE instance;
PFN_DirectInput8Create Create;
@ -422,7 +413,6 @@ typedef struct _GLFWcursorWin32
//
typedef struct _GLFWtimerWin32
{
GLFWbool hasPC;
uint64_t frequency;
} _GLFWtimerWin32;

18
src/win32_time.c
View File

@ -38,18 +38,7 @@
//
void _glfwInitTimerWin32(void)
{
uint64_t frequency;
if (QueryPerformanceFrequency((LARGE_INTEGER*) &frequency))
{
_glfw.timer.win32.hasPC = GLFW_TRUE;
_glfw.timer.win32.frequency = frequency;
}
else
{
_glfw.timer.win32.hasPC = GLFW_FALSE;
_glfw.timer.win32.frequency = 1000;
}
QueryPerformanceFrequency((LARGE_INTEGER*) &_glfw.timer.win32.frequency);
}
@ -58,16 +47,11 @@ void _glfwInitTimerWin32(void)
//////////////////////////////////////////////////////////////////////////
uint64_t _glfwPlatformGetTimerValue(void)
{
if (_glfw.timer.win32.hasPC)
{
uint64_t value;
QueryPerformanceCounter((LARGE_INTEGER*) &value);
return value;
}
else
return (uint64_t) timeGetTime();
}
uint64_t _glfwPlatformGetTimerFrequency(void)
{