diff options
Diffstat (limited to 'src/mongo/util/timer-inl.h')
| -rw-r--r-- | src/mongo/util/timer-inl.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/mongo/util/timer-inl.h b/src/mongo/util/timer-inl.h index 20a014d6276..2616cb7b038 100644 --- a/src/mongo/util/timer-inl.h +++ b/src/mongo/util/timer-inl.h @@ -25,8 +25,24 @@ #pragma once +#if defined(MONGO_HAVE_HEADER_UNISTD_H) +#include <unistd.h> +#endif + #if defined(_WIN32) + +// On Windows, prefer the Windows-specific implementation, which employs QueryPerformanceCounter. #include "mongo/util/timer-win32-inl.h" + +#elif defined(_POSIX_TIMERS) and _POSIX_TIMERS > 0 and defined(_POSIX_MONOTONIC_CLOCK) and _POSIX_MONOTONIC_CLOCK > 0 + +// On systems that support the POSIX clock_gettime function, and the "monotonic" clock, +// use those. +#include "mongo/util/timer-posixclock-inl.h" + #else + +// If all else fails, fall back to a generic implementation. Performance may suffer. #include "mongo/util/timer-generic-inl.h" + #endif |