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| author | Josh Stone <jistone@redhat.com> | 2010-02-15 21:27:37 -0800 |
|---|---|---|
| committer | Josh Stone <jistone@redhat.com> | 2010-02-16 15:55:01 -0800 |
| commit | d9f58253e30ea80e57d8f54e41e9cd114cc13973 (patch) | |
| tree | 557c38cd069499be0defe734595af161a166bd98 /runtime/runtime.h | |
| parent | 4fa8e6497405fd4f121a3eee0c6d772aaeeef6d8 (diff) | |
| download | systemtap-steved-d9f58253e30ea80e57d8f54e41e9cd114cc13973.tar.gz systemtap-steved-d9f58253e30ea80e57d8f54e41e9cd114cc13973.tar.xz systemtap-steved-d9f58253e30ea80e57d8f54e41e9cd114cc13973.zip | |
Use clamping to more easily normalize input values
The kernel has min/max/clamp macros to make range comparisons easier.
Clamp is a newer invention, but we can define it for older kernels in
terms of min and max.
Diffstat (limited to 'runtime/runtime.h')
| -rw-r--r-- | runtime/runtime.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/runtime/runtime.h b/runtime/runtime.h index 91c48d57..c51520d0 100644 --- a/runtime/runtime.h +++ b/runtime/runtime.h @@ -50,6 +50,14 @@ #define stp_for_each_cpu(cpu) for_each_cpu_mask((cpu), cpu_possible_map) #endif +#ifndef clamp +#define clamp(val, low, high) min(max(low, val), high) +#endif + +#ifndef clamp_t +#define clamp_t(type, val, low, high) min_t(type, max_t(type, low, val), high) +#endif + static void _stp_dbug (const char *func, int line, const char *fmt, ...) __attribute__ ((format (printf, 3, 4))); static void _stp_error (const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); static void _stp_warn (const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); |