diff options
Diffstat (limited to 'erts/emulator/sys/unix/erl_unix_sys.h')
| -rw-r--r-- | erts/emulator/sys/unix/erl_unix_sys.h | 239 |
1 files changed, 189 insertions, 50 deletions
diff --git a/erts/emulator/sys/unix/erl_unix_sys.h b/erts/emulator/sys/unix/erl_unix_sys.h index c8fcec8547..b55180c509 100644 --- a/erts/emulator/sys/unix/erl_unix_sys.h +++ b/erts/emulator/sys/unix/erl_unix_sys.h @@ -3,16 +3,17 @@ * * Copyright Ericsson AB 1997-2011. All Rights Reserved. * - * The contents of this file are subject to the Erlang Public License, - * Version 1.1, (the "License"); you may not use this file except in - * compliance with the License. You should have received a copy of the - * Erlang Public License along with this software. If not, it can be - * retrieved online at http://www.erlang.org/. - * - * Software distributed under the License is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - * the License for the specific language governing rights and limitations - * under the License. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. * * %CopyrightEnd% * @@ -45,7 +46,7 @@ #include <fcntl.h> #include "erl_errno.h" #include <signal.h> - +#include <setjmp.h> #if HAVE_SYS_SOCKETIO_H # include <sys/socketio.h> @@ -107,14 +108,13 @@ #endif #include <netdb.h> +#ifdef HAVE_POSIX_MEMALIGN +# define ERTS_HAVE_ERTS_SYS_ALIGNED_ALLOC 1 +#endif + /* * 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 @@ -123,12 +123,14 @@ # endif #endif +/* + * Min number of async threads + */ +#define ERTS_MIN_NO_OF_ASYNC_THREADS 0 + /* File descriptors are numbers anc consecutively allocated on Unix */ #define ERTS_SYS_CONTINOUS_FD_NUMBERS -#define HAVE_ERTS_CHECK_IO_DEBUG -int erts_check_io_debug(void); - #ifndef ERTS_SMP # undef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT # define ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT @@ -154,35 +156,134 @@ 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; +typedef long ErtsSysHrTime; +#elif SIZEOF_LONG_LONG == 8 +typedef long long ErtsMonotonicTime; +typedef long long ErtsSysHrTime; +#else +#error No signed 64-bit type found... +#endif -#ifdef HAVE_GETHRTIME -#ifdef GETHRTIME_WITH_CLOCK_GETTIME -typedef long long SysHrTime; +typedef ErtsMonotonicTime ErtsSystemTime; -extern SysHrTime sys_gethrtime(void); -#define sys_init_hrtime() /* Nothing */ +#define ERTS_MONOTONIC_TIME_MIN (((ErtsMonotonicTime) 1) << 63) +#define ERTS_MONOTONIC_TIME_MAX (~ERTS_MONOTONIC_TIME_MIN) -#else /* Real gethrtime (Solaris) */ +/* + * OS monotonic time and OS system time + */ +#undef ERTS_OS_TIMES_INLINE_FUNC_PTR_CALL__ + +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) \ + && defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) +# if defined(__linux__) +# define ERTS_OS_TIMES_INLINE_FUNC_PTR_CALL__ 1 +# endif +#endif + +ErtsSystemTime erts_os_system_time(void); + +#undef ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT +#undef ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT +#undef ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ + +#if defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) +# define ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT 1 +# define ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT (1000*1000*1000) +# if defined(__linux__) +# define ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ 1 +# endif +#elif defined(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME) +# define ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT 1 +# define ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT (1000*1000*1000) +#elif defined(OS_MONOTONIC_TIME_USING_GETHRTIME) +# define ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT 1 +# define ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT (1000*1000*1000) +#elif defined(OS_MONOTONIC_TIME_USING_TIMES) +# define ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT 1 +/* Time unit determined at runtime... */ +# define ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT 0 +#else /* No OS monotonic available... */ +# define ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT (1000*1000) +#endif + +/* + * erts_sys_hrtime() is the highest resolution + * time function found. Time unit is nano-seconds. + * It may or may not be monotonic. + */ +ErtsSysHrTime erts_sys_hrtime(void); + +struct erts_sys_time_read_only_data__ { +#ifdef ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ + ErtsMonotonicTime (*os_monotonic_time)(void); +#endif +#ifdef ERTS_OS_TIMES_INLINE_FUNC_PTR_CALL__ + void (*os_times)(ErtsMonotonicTime *, ErtsSystemTime *); +#endif + int ticks_per_sec; +}; -typedef hrtime_t SysHrTime; +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__; -#define sys_gethrtime() gethrtime() -#define sys_init_hrtime() /* Nothing */ +extern ErtsSysTimeData__ erts_sys_time_data__; -#endif /* GETHRTIME_WITH_CLOCK_GETTIME */ -#endif /* HAVE_GETHRTIME */ +#ifdef ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT -#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME)) +#ifdef ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ +ERTS_GLB_INLINE +#endif +ErtsMonotonicTime erts_os_monotonic_time(void); + +#ifdef ERTS_OS_TIMES_INLINE_FUNC_PTR_CALL__ +ERTS_GLB_INLINE +#endif +void erts_os_times(ErtsMonotonicTime *, ErtsSystemTime *); + +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +#ifdef ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ + +ERTS_GLB_INLINE ErtsMonotonicTime +erts_os_monotonic_time(void) +{ + return (*erts_sys_time_data__.r.o.os_monotonic_time)(); +} + +#endif /* ERTS_OS_MONOTONIC_INLINE_FUNC_PTR_CALL__ */ + +#ifdef ERTS_OS_TIMES_INLINE_FUNC_PTR_CALL__ + +ERTS_GLB_INLINE void +erts_os_times(ErtsMonotonicTime *mtimep, ErtsSystemTime *stimep) +{ + return (*erts_sys_time_data__.r.o.os_times)(mtimep, stimep); +} + +#endif /* ERTS_OS_TIMES_INLINE_FUNC_PTR_CALL__ */ + +#endif /* ERTS_GLB_INLINE_INCL_FUNC_DEF */ + +#endif /* ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT */ + +/* + * + */ + +#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME_CPU_TIME)) typedef long long SysCpuTime; typedef struct timespec SysTimespec; @@ -194,7 +295,7 @@ typedef struct timespec SysTimespec; int sys_start_hrvtime(void); int sys_stop_hrvtime(void); -#elif defined(HAVE_CLOCK_GETTIME) +#elif defined(HAVE_CLOCK_GETTIME_CPU_TIME) #define sys_clock_gettime(cid,tp) clock_gettime((cid),&(tp)) #define sys_get_proc_cputime(t,tp) sys_clock_gettime(CLOCK_PROCESS_CPUTIME_ID,(tp)) @@ -205,26 +306,40 @@ int sys_stop_hrvtime(void); #define SYS_CLOCK_RESOLUTION 1 /* These are defined in sys.c */ -#if defined(SIG_SIGSET) /* Old SysV */ -RETSIGTYPE (*sys_sigset())(); -#elif defined(SIG_SIGNAL) /* Old BSD */ -RETSIGTYPE (*sys_sigset())(); -#else -RETSIGTYPE (*sys_sigset(int, RETSIGTYPE (*func)(int)))(int); -#endif +typedef void (*SIGFUNC)(int); +extern SIGFUNC sys_signal(int, SIGFUNC); extern void sys_sigrelease(int); extern void sys_sigblock(int); extern void sys_stop_cat(void); +extern void sys_init_suspend_handler(void); /* * Handling of floating point exceptions. */ #ifdef USE_ISINF_ISNAN /* simulate finite() */ -# define finite(f) (!isinf(f) && !isnan(f)) -# define HAVE_FINITE +# define isfinite(f) (!isinf(f) && !isnan(f)) +# define HAVE_ISFINITE +#elif (defined(__GNUC__) && !defined(__llvm__)) && defined(HAVE_FINITE) +/* We use finite in gcc as it emits assembler instead of + the function call that isfinite emits. The assembler is + significantly faster. */ +# ifdef isfinite +# undef isfinite +# endif +# define isfinite finite +# ifndef HAVE_ISFINITE +# define HAVE_ISFINITE +# endif +#elif defined(isfinite) && !defined(HAVE_ISFINITE) +# define HAVE_ISFINITE +#elif !defined(HAVE_ISFINITE) && defined(HAVE_FINITE) +# define isfinite finite +# define HAVE_ISFINITE #endif +#define erts_isfinite isfinite + #ifdef NO_FPE_SIGNALS #define erts_get_current_fp_exception() NULL @@ -232,7 +347,7 @@ extern void sys_stop_cat(void); #define erts_thread_init_fp_exception() do{}while(0) #endif # define __ERTS_FP_CHECK_INIT(fpexnp) do {} while (0) -# define __ERTS_FP_ERROR(fpexnp, f, Action) if (!finite(f)) { Action; } else {} +# define __ERTS_FP_ERROR(fpexnp, f, Action) if (!isfinite(f)) { Action; } else {} # define __ERTS_FP_ERROR_THOROUGH(fpexnp, f, Action) __ERTS_FP_ERROR(fpexnp, f, Action) # define __ERTS_SAVE_FP_EXCEPTION(fpexnp) # define __ERTS_RESTORE_FP_EXCEPTION(fpexnp) @@ -296,7 +411,7 @@ static __inline__ void __ERTS_FP_CHECK_INIT(volatile unsigned long *fp_exception code to always throw floating-point exceptions on errors. */ static __inline__ int erts_check_fpe_thorough(volatile unsigned long *fp_exception, double f) { - return erts_check_fpe(fp_exception, f) || !finite(f); + return erts_check_fpe(fp_exception, f) || !isfinite(f); } # define __ERTS_FP_ERROR_THOROUGH(fpexnp, f, Action) \ do { if (erts_check_fpe_thorough((fpexnp),(f))) { Action; } } while (0) @@ -332,4 +447,28 @@ extern int exit_async(void); #define ERTS_EXIT_AFTER_DUMP _exit +#if !defined(__APPLE__) && !defined(__MACH__) +/* Some OS X versions do not allow (ab)using signal handlers like this */ +#define ERTS_HAVE_TRY_CATCH 1 + +/* We try to simulate a try catch in C with the help of signal handlers. + * Only use this as a very last resort, as it is not very portable and + * quite unstable. It is also not thread safe, so make sure that only + * one thread can call this at a time! + */ +extern void erts_sys_sigsegv_handler(int); +extern jmp_buf erts_sys_sigsegv_jmp; +#define ERTS_SYS_TRY_CATCH(EXPR,CATCH) \ + do { \ + SIGFUNC prev_handler = sys_signal(SIGSEGV, \ + erts_sys_sigsegv_handler); \ + if (!setjmp(erts_sys_sigsegv_jmp)) { \ + EXPR; \ + } else { \ + CATCH; \ + } \ + sys_signal(SIGSEGV,prev_handler); \ + } while(0) +#endif + #endif /* #ifndef _ERL_UNIX_SYS_H */ |