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-rw-r--r--src/pulsecore/macro.h73
1 files changed, 63 insertions, 10 deletions
diff --git a/src/pulsecore/macro.h b/src/pulsecore/macro.h
index ba538172..1d9eafd5 100644
--- a/src/pulsecore/macro.h
+++ b/src/pulsecore/macro.h
@@ -33,12 +33,22 @@
#include <stdlib.h>
#include <pulsecore/log.h>
-#include <pulsecore/gccmacro.h>
+#include <pulse/gccmacro.h>
#ifndef PACKAGE
#error "Please include config.h before including this file!"
#endif
+#ifndef PA_LIKELY
+#ifdef __GNUC__
+#define PA_LIKELY(x) (__builtin_expect(!!(x),1))
+#define PA_UNLIKELY(x) (__builtin_expect((x),0))
+#else
+#define PA_LIKELY(x) (x)
+#define PA_UNLIKELY(x) (x)
+#endif
+#endif
+
#if defined(PAGE_SIZE)
#define PA_PAGE_SIZE ((size_t) PAGE_SIZE)
#elif defined(PAGESIZE)
@@ -67,19 +77,53 @@ 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.*/
@@ -166,8 +210,17 @@ typedef int pa_bool_t;
#define PA_PATH_SEP_CHAR '/'
#endif
-static inline const char *pa_strnull(const char *x) {
- return x ? x : "(null)";
-}
+#ifdef __GNUC__
+
+#define PA_WARN_REFERENCE(sym, msg) \
+ __asm__(".section .gnu.warning." #sym); \
+ __asm__(".asciz \"" msg "\""); \
+ __asm__(".previous")
+
+#else
+
+#define PA_WARN_REFERENCE(sym, msg)
+
+#endif
#endif