diff options
Diffstat (limited to 'erts/emulator/sys/unix/erl_unix_sys.h')
-rw-r--r-- | erts/emulator/sys/unix/erl_unix_sys.h | 120 |
1 files changed, 97 insertions, 23 deletions
diff --git a/erts/emulator/sys/unix/erl_unix_sys.h b/erts/emulator/sys/unix/erl_unix_sys.h index f0050db114..46d0b8dc9b 100644 --- a/erts/emulator/sys/unix/erl_unix_sys.h +++ b/erts/emulator/sys/unix/erl_unix_sys.h @@ -114,11 +114,6 @@ /* * Make sure that MAXPATHLEN is defined. */ -#ifdef GETHRTIME_WITH_CLOCK_GETTIME -#undef HAVE_GETHRTIME -#define HAVE_GETHRTIME 1 -#endif - #ifndef MAXPATHLEN # ifdef PATH_MAX # define MAXPATHLEN PATH_MAX @@ -160,33 +155,112 @@ typedef struct timeval SysTimeval; typedef struct tms SysTimes; -extern int erts_ticks_per_sec; - -#define SYS_CLK_TCK (erts_ticks_per_sec) +#define SYS_CLK_TCK (erts_sys_time_data__.r.o.ticks_per_sec) #define sys_times(Arg) times(Arg) -#define ERTS_WRAP_SYS_TIMES 1 -extern int erts_ticks_per_sec_wrap; -#define SYS_CLK_TCK_WRAP (erts_ticks_per_sec_wrap) -extern clock_t sys_times_wrap(void); +#if SIZEOF_LONG == 8 +typedef long ErtsMonotonicTime; +#elif SIZEOF_LONG_LONG == 8 +typedef long long ErtsMonotonicTime; +#else +#error No signed 64-bit type found... +#endif + +#define ERTS_MONOTONIC_TIME_MIN (((ErtsMonotonicTime) 1) << 63) +#define ERTS_MONOTONIC_TIME_MAX (~ERTS_MONOTONIC_TIME_MIN) + +/* + * OS monotonic time + */ + +/* + * Most common with os monotonic time using nano second + * time unit. These defines are modified below if this + * isn't the case... + */ +#define ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT 1 +#define ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT (1000*1000*1000) + +#undef ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ +#undef ERTS_HAVE_CORRECTED_OS_MONOTONIC + +#if defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) + +#if defined(__linux__) -#ifdef HAVE_GETHRTIME -#ifdef GETHRTIME_WITH_CLOCK_GETTIME -typedef long long SysHrTime; +#define ERTS_HAVE_CORRECTED_OS_MONOTONIC 1 +#define ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ 1 -extern SysHrTime sys_gethrtime(void); -#define sys_init_hrtime() /* Nothing */ +#else /* !defined(__linux__) */ -#else /* Real gethrtime (Solaris) */ +ErtsMonotonicTime erts_os_monotonic_time(void); -typedef hrtime_t SysHrTime; +#endif /* !defined(__linux__) */ + +#elif defined(OS_MONOTONIC_TIME_USING_GETHRTIME) + +#define erts_os_monotonic() ((ErtsMonotonicTime) gethrtime()) + +#elif defined(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME) \ + || defined(OS_MONOTONIC_TIME_USING_TIMES) + +#if defined(OS_MONOTONIC_TIME_USING_TIMES) +# undef ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT +# define ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT (1000*1000) +# define ERTS_HAVE_ERTS_OS_TIME_OFFSET_FINALIZE 1 +void erts_os_time_offset_finalize(void); +# define ERTS_HAVE_ERTS_OS_MONOTONIC_TIME_INIT +void erts_os_monotonic_time_init(void); +#endif -#define sys_gethrtime() gethrtime() -#define sys_init_hrtime() /* Nothing */ +ErtsMonotonicTime erts_os_monotonic_time(void); -#endif /* GETHRTIME_WITH_CLOCK_GETTIME */ -#endif /* HAVE_GETHRTIME */ +#else /* No OS monotonic available... */ + +#undef ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT +#undef ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT +#define ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT (1000*1000) + +#endif + +struct erts_sys_time_read_only_data__ { +#ifdef ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ + ErtsMonotonicTime (*os_monotonic_time)(void); +#endif + int ticks_per_sec; +}; + +typedef struct { + union { + struct erts_sys_time_read_only_data__ o; + char align__[(((sizeof(struct erts_sys_time_read_only_data__) - 1) + / ASSUMED_CACHE_LINE_SIZE) + 1) + * ASSUMED_CACHE_LINE_SIZE]; + } r; +} ErtsSysTimeData__; + +extern ErtsSysTimeData__ erts_sys_time_data__; + +#ifdef ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ + +ERTS_GLB_INLINE ErtsMonotonicTime erts_os_monotonic_time(void); + +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +ERTS_GLB_INLINE ErtsMonotonicTime +erts_os_monotonic_time(void) +{ + return (*erts_sys_time_data__.r.o.os_monotonic_time)(); +} + +#endif /* ERTS_GLB_INLINE_INCL_FUNC_DEF */ + +#endif /* ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ */ + +/* + * + */ #if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME_CPU_TIME)) typedef long long SysCpuTime; |