diff options
Diffstat (limited to 'examples/allatency.c')
| -rw-r--r-- | examples/allatency.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/examples/allatency.c b/examples/allatency.c index 5aa9e864..3b141ac0 100644 --- a/examples/allatency.c +++ b/examples/allatency.c @@ -51,6 +51,17 @@ static LPALGETSOURCEI64SOFT alGetSourcei64SOFT; static LPALGETSOURCE3I64SOFT alGetSource3i64SOFT; static LPALGETSOURCEI64VSOFT alGetSourcei64vSOFT; +/* C doesn't allow casting between function and non-function pointer types, so + * with C99 we need to use a union to reinterpret the pointer type. Pre-C99 + * still needs to use a normal cast and live with the warning (C++ is fine with + * a regular reinterpret_cast). + */ +#if __STDC_VERSION__ >= 199901L +#define FUNCTION_CAST(T, ptr) (union{void *p; T f;}){ptr}.f +#else +#define FUNCTION_CAST(T, ptr) (T)(ptr) +#endif + /* LoadBuffer loads the named audio file into an OpenAL buffer object, and * returns the new buffer ID. */ @@ -164,7 +175,7 @@ int main(int argc, char **argv) } /* Define a macro to help load the function pointers. */ -#define LOAD_PROC(T, x) ((x) = (T)alGetProcAddress(#x)) +#define LOAD_PROC(T, x) ((x) = FUNCTION_CAST(T, alGetProcAddress(#x))) LOAD_PROC(LPALSOURCEDSOFT, alSourcedSOFT); LOAD_PROC(LPALSOURCE3DSOFT, alSource3dSOFT); LOAD_PROC(LPALSOURCEDVSOFT, alSourcedvSOFT); |