diff options
Diffstat (limited to 'src/pulsecore/macro.h')
| -rw-r--r-- | src/pulsecore/macro.h | 46 |
1 files changed, 40 insertions, 6 deletions
diff --git a/src/pulsecore/macro.h b/src/pulsecore/macro.h index 41af19c9..60ab025c 100644 --- a/src/pulsecore/macro.h +++ b/src/pulsecore/macro.h @@ -65,19 +65,53 @@ static inline size_t pa_page_align(size_t l) { #define PA_ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0])) -#ifndef MAX -#define MAX(a, b) ((a) > (b) ? (a) : (b)) +/* The users of PA_MIN and PA_MAX should be aware that these macros on + * non-GCC executed code with side effects twice. It is thus + * considered misuse to use code with side effects as arguments to MIN + * and MAX. */ + +#ifdef __GNUC__ +#define PA_MAX(a,b) \ + __extension__ ({ typeof(a) _a = (a); \ + typeof(b) _b = (b); \ + _a > _b ? _a : _b; \ + }) +#else +#define PA_MAX(a, b) ((a) > (b) ? (a) : (b)) #endif -#ifndef MIN -#define MIN(a, b) ((a) < (b) ? (a) : (b)) +#ifdef __GNUC__ +#define PA_MIN(a,b) \ + __extension__ ({ typeof(a) _a = (a); \ + typeof(b) _b = (b); \ + _a < _b ? _a : _b; \ + }) +#else +#define PA_MIN(a, b) ((a) < (b) ? (a) : (b)) #endif -#ifndef CLAMP -#define CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x))) +#ifdef __GNUC__ +#define PA_CLAMP(x, low, high) \ + __extension__ ({ typeof(x) _x = (x); \ + typeof(low) _low = (low); \ + typeof(high) _high = (high); \ + ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \ + }) +#else +#define PA_CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x))) #endif +#ifdef __GNUC__ +#define PA_CLAMP_UNLIKELY(x, low, high) \ + __extension__ ({ typeof(x) _x = (x); \ + typeof(low) _low = (low); \ + typeof(high) _high = (high); \ + (PA_UNLIKELY(_x > _high) ? _high : (PA_UNLIKELY(_x < _low) ? _low : _x)); \ + }) +#else #define PA_CLAMP_UNLIKELY(x, low, high) (PA_UNLIKELY((x) > (high)) ? (high) : (PA_UNLIKELY((x) < (low)) ? (low) : (x))) +#endif + /* We don't define a PA_CLAMP_LIKELY here, because it doesn't really * make sense: we cannot know if it is more likely that the values is * lower or greater than the boundaries.*/ |