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windows: OS version checks now cache results. 

So these only have to talk to the Win32 API once per check, per process.
main
Ryan C. Gordon 2024-01-25 18:17:17 -05:00
parent 4fba663368
commit 56fa22c63b
1 changed files with 20 additions and 15 deletions
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35
src/core/windows/SDL_windows.c
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@ -197,33 +197,38 @@ static BOOL IsWindowsVersionOrGreater(WORD wMajorVersion, WORD wMinorVersion, WO
}
#endif
// apply some static variables so we only call into the Win32 API once per process for each check.
#if defined(SDL_PLATFORM_WINRT) || defined(SDL_PLATFORM_XBOXONE) || defined(SDL_PLATFORM_XBOXSERIES)
#define CHECKWINVER(notdesktop_platform_result, test) return (notdesktop_platform_result);
#else
#define CHECKWINVER(notdesktop_platform_result, test) \
static SDL_bool checked = SDL_FALSE; \
static BOOL retval = FALSE; \
if (!checked) { \
retval = (test); \
checked = SDL_TRUE; \
} \
return retval;
#endif
BOOL WIN_IsWindowsVistaOrGreater(void)
{
#if defined(SDL_PLATFORM_WINRT) || defined(SDL_PLATFORM_XBOXONE) || defined(SDL_PLATFORM_XBOXSERIES)
return TRUE;
#else
return IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_VISTA), LOBYTE(_WIN32_WINNT_VISTA), 0);
#endif
CHECKWINVER(TRUE, IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_VISTA), LOBYTE(_WIN32_WINNT_VISTA), 0));
}
BOOL WIN_IsWindows7OrGreater(void)
{
#if defined(SDL_PLATFORM_WINRT) || defined(SDL_PLATFORM_XBOXONE) || defined(SDL_PLATFORM_XBOXSERIES)
return TRUE;
#else
return IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_WIN7), LOBYTE(_WIN32_WINNT_WIN7), 0);
#endif
CHECKWINVER(TRUE, IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_WIN7), LOBYTE(_WIN32_WINNT_WIN7), 0));
}
BOOL WIN_IsWindows8OrGreater(void)
{
#if defined(SDL_PLATFORM_WINRT) || defined(SDL_PLATFORM_XBOXONE) || defined(SDL_PLATFORM_XBOXSERIES)
return TRUE;
#else
return IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_WIN8), LOBYTE(_WIN32_WINNT_WIN8), 0);
#endif
CHECKWINVER(TRUE, IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_WIN8), LOBYTE(_WIN32_WINNT_WIN8), 0));
}
#undef CHECKWINVER
/*
WAVExxxCAPS gives you 31 bytes for the device name, and just truncates if it's
longer. However, since WinXP, you can use the WAVExxxCAPS2 structure, which