/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2013. All Rights Reserved.
*
* 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%
*/
#ifndef __SYS_H__
#define __SYS_H__
#ifdef ERTS_INLINE
# ifndef ERTS_CAN_INLINE
# define ERTS_CAN_INLINE 1
# endif
#else
# if defined(__GNUC__)
# define ERTS_CAN_INLINE 1
# define ERTS_INLINE __inline__
# elif defined(__WIN32__)
# define ERTS_CAN_INLINE 1
# define ERTS_INLINE __inline
# else
# define ERTS_CAN_INLINE 0
# define ERTS_INLINE
# endif
#endif
#if defined(DEBUG) || defined(ERTS_ENABLE_LOCK_CHECK)
# undef ERTS_CAN_INLINE
# define ERTS_CAN_INLINE 0
# undef ERTS_INLINE
# define ERTS_INLINE
#endif
#if ERTS_CAN_INLINE
#define ERTS_GLB_INLINE static ERTS_INLINE
#else
#define ERTS_GLB_INLINE
#endif
#if ERTS_CAN_INLINE || defined(ERTS_DO_INCL_GLB_INLINE_FUNC_DEF)
# define ERTS_GLB_INLINE_INCL_FUNC_DEF 1
#else
# define ERTS_GLB_INLINE_INCL_FUNC_DEF 0
#endif
#if defined(VALGRIND) && !defined(NO_FPE_SIGNALS)
# define NO_FPE_SIGNALS
#endif
#ifdef DISABLE_CHILD_WAITER_THREAD
#undef ENABLE_CHILD_WAITER_THREAD
#endif
#if defined(ERTS_SMP) && !defined(DISABLE_CHILD_WAITER_THREAD)
#undef ENABLE_CHILD_WAITER_THREAD
#define ENABLE_CHILD_WAITER_THREAD 1
#endif
#define ERTS_I64_LITERAL(X) X##LL
#define ErtsInArea(ptr,start,nbytes) \
((UWord)((char*)(ptr) - (char*)(start)) < (nbytes))
#if defined (__WIN32__)
# include "erl_win_sys.h"
#else
# include "erl_unix_sys.h"
#ifndef UNIX
# define UNIX 1
#endif
#endif
#include "erl_misc_utils.h"
/*
* To allow building of Universal Binaries for Mac OS X,
* we must not depend on the endian detected by the configure script.
*/
#if defined(__APPLE__)
# if defined(__BIG_ENDIAN__) && !defined(WORDS_BIGENDIAN)
# define WORDS_BIGENDIAN 1
# elif !defined(__BIG_ENDIAN__) && defined(WORDS_BIGENDIAN)
# undef WORDS_BIGENDIAN
# endif
#endif
/*
* Make sure we have a type for FD's (used by erl_check_io)
*/
#ifndef ERTS_SYS_FD_TYPE
#define ERTS_SYS_FD_INVALID ((ErtsSysFdType) -1)
typedef int ErtsSysFdType;
#else
#ifndef ERTS_SYS_FD_INVALID
# error missing ERTS_SYS_FD_INVALID
#endif
typedef ERTS_SYS_FD_TYPE ErtsSysFdType;
#endif
#if !defined(__GNUC__)
# define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) 0
#elif !defined(__GNUC_MINOR__)
# define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \
((__GNUC__ << 24) >= (((MAJ) << 24) | ((MIN) << 12) | (PL)))
#elif !defined(__GNUC_PATCHLEVEL__)
# define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \
(((__GNUC__ << 24) | (__GNUC_MINOR__ << 12)) >= (((MAJ) << 24) | ((MIN) << 12) | (PL)))
#else
# define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \
(((__GNUC__ << 24) | (__GNUC_MINOR__ << 12) | __GNUC_PATCHLEVEL__) >= (((MAJ) << 24) | ((MIN) << 12) | (PL)))
#endif
#if ERTS_AT_LEAST_GCC_VSN__(2, 96, 0)
# define ERTS_LIKELY(BOOL) __builtin_expect((BOOL), !0)
# define ERTS_UNLIKELY(BOOL) __builtin_expect((BOOL), 0)
#else
# define ERTS_LIKELY(BOOL) (BOOL)
# define ERTS_UNLIKELY(BOOL) (BOOL)
#endif
#ifdef __GNUC__
# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 5)
# define ERTS_DECLARE_DUMMY(X) X __attribute__ ((unused))
# else
# define ERTS_DECLARE_DUMMY(X) X
# endif
#else
# define ERTS_DECLARE_DUMMY(X) X
#endif
#if !defined(__func__)
# if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L
# if !defined(__GNUC__) || __GNUC__ < 2
# define __func__ "[unknown_function]"
# else
# define __func__ __FUNCTION__
# endif
# endif
#endif
#define ERTS_MK_VSN_INT(Major, Minor, Build) \
((((Major) & 0x3ff) << 20) | (((Minor) & 0x3ff) << 10) | ((Build) & 0x3ff))
#ifndef ERTS_EXIT_AFTER_DUMP
# define ERTS_EXIT_AFTER_DUMP exit
#endif
/* In VC++, noreturn is a declspec that has to be before the types,
* but in GNUC it is an att ribute to be placed between return type
* and function name, hence __decl_noreturn <types> __noreturn <function name>
*
* at some platforms (e.g. Android) __noreturn is defined at sys/cdef.h
*/
#if __GNUC__
# define __decl_noreturn
# ifndef __noreturn
# define __noreturn __attribute__((noreturn))
# endif
#else
# if defined(__WIN32__) && defined(_MSC_VER)
# define __noreturn
# define __decl_noreturn __declspec(noreturn)
# else
# define __noreturn
# define __decl_noreturn
# endif
#endif
#define ERTS_ASSERT(e) \
((void) ((e) ? 1 : (erl_assert_error(#e, __func__, __FILE__, __LINE__), 0)))
__decl_noreturn void __noreturn erl_assert_error(const char* expr, const char *func,
const char* file, int line);
#ifdef DEBUG
# define ASSERT(e) ERTS_ASSERT(e)
#else
# define ASSERT(e) ((void) 1)
#endif
/* ERTS_UNDEF can be used to silence false warnings about
* "variable may be used uninitialized" while keeping the variable
* marked as undefined by valgrind.
*/
#ifdef VALGRIND
# define ERTS_UNDEF(V,I)
#else
# define ERTS_UNDEF(V,I) V = I
#endif
/*
* Compile time assert
* (the actual compiler error msg can be a bit confusing)
*/
#if ERTS_AT_LEAST_GCC_VSN__(3,1,1)
# define ERTS_CT_ASSERT(e) \
do { \
enum { compile_time_assert__ = __builtin_choose_expr((e),0,(void)0) }; \
} while(0)
#else
# define ERTS_CT_ASSERT(e) \
do { \
enum { compile_time_assert__ = 1/(e) }; \
} while (0)
#endif
/*
* Microsoft C/C++: We certainly want to use stdarg.h and prototypes.
* But MSC doesn't define __STDC__, unless we compile with the -Za
* flag (strict ANSI C, no Microsoft extension). Compiling with -Za
* doesn't work: some Microsoft headers fail to compile...
*
* Solution: Test if __STDC__ or _MSC_VER is defined.
*
* Note: Simply defining __STDC__ doesn't work, as some Microsoft
* headers will fail to compile!
*/
#include <stdarg.h>
/* This isn't sys-dependent, but putting it here benefits sys.c and drivers
- allow use of 'const' regardless of compiler */
#if !defined(__STDC__) && !defined(_MSC_VER)
# define const
#endif
#undef __deprecated
#if ERTS_AT_LEAST_GCC_VSN__(3, 0, 0)
# define __deprecated __attribute__((deprecated))
#else
# define __deprecated
#endif
#if ERTS_AT_LEAST_GCC_VSN__(3, 0, 4)
# define erts_align_attribute(SZ) __attribute__ ((aligned (SZ)))
#else
# define erts_align_attribute(SZ)
#endif
/*
** Data types:
**
** Eterm: A tagged erlang term (possibly 64 bits)
** BeamInstr: A beam code instruction unit, possibly larger than Eterm, not smaller.
** UInt: An unsigned integer exactly as large as an Eterm.
** SInt: A signed integer exactly as large as an eterm and therefor large
** enough to hold the return value of the signed_val() macro.
** UWord: An unsigned integer at least as large as a void * and also as large
** or larger than an Eterm
** SWord: A signed integer at least as large as a void * and also as large
** or larger than an Eterm
** Uint32: An unsigned integer of 32 bits exactly
** Sint32: A signed integer of 32 bits exactly
** Uint16: An unsigned integer of 16 bits exactly
** Sint16: A signed integer of 16 bits exactly.
*/
#if !((SIZEOF_VOID_P >= 4) && (SIZEOF_VOID_P == SIZEOF_SIZE_T) \
&& ((SIZEOF_VOID_P == SIZEOF_INT) || (SIZEOF_VOID_P == SIZEOF_LONG) || \
(SIZEOF_VOID_P == SIZEOF_LONG_LONG)))
#error Cannot handle this combination of int/long/void*/size_t sizes
#endif
#if SIZEOF_VOID_P == 8
#undef ARCH_32
#define ARCH_64
#define ERTS_SIZEOF_TERM 8
#elif SIZEOF_VOID_P == 4
#define ARCH_32
#undef ARCH_64
#define ERTS_SIZEOF_TERM 4
#else
#error Neither 32 nor 64 bit architecture
#endif
#if SIZEOF_VOID_P != SIZEOF_SIZE_T
#error sizeof(void*) != sizeof(size_t)
#endif
#if SIZEOF_VOID_P == SIZEOF_LONG
typedef unsigned long Eterm;
typedef unsigned long Uint;
typedef long Sint;
#define SWORD_CONSTANT(Const) Const##L
#define UWORD_CONSTANT(Const) Const##UL
#define ERTS_UWORD_MAX ULONG_MAX
#define ERTS_SWORD_MAX LONG_MAX
#define ERTS_SIZEOF_ETERM SIZEOF_LONG
#define ErtsStrToSint strtol
#elif SIZEOF_VOID_P == SIZEOF_INT
typedef unsigned int Eterm;
typedef unsigned int Uint;
typedef int Sint;
#define SWORD_CONSTANT(Const) Const
#define UWORD_CONSTANT(Const) Const##U
#define ERTS_UWORD_MAX UINT_MAX
#define ERTS_SWORD_MAX INT_MAX
#define ERTS_SIZEOF_ETERM SIZEOF_INT
#define ErtsStrToSint strtol
#elif SIZEOF_VOID_P == SIZEOF_LONG_LONG
typedef unsigned long long Eterm;
typedef unsigned long long Uint;
typedef long long Sint;
#define SWORD_CONSTANT(Const) Const##LL
#define UWORD_CONSTANT(Const) Const##ULL
#define ERTS_UWORD_MAX ULLONG_MAX
#define ERTS_SWORD_MAX LLONG_MAX
#define ERTS_SIZEOF_ETERM SIZEOF_LONG_LONG
#if defined(__WIN32__)
#define ErtsStrToSint _strtoi64
#else
#define ErtsStrToSint strtoll
#endif
#else
#error Found no appropriate type to use for 'Eterm', 'Uint' and 'Sint'
#endif
typedef Uint UWord;
typedef Sint SWord;
#define ERTS_UINT_MAX ERTS_UWORD_MAX
typedef UWord BeamInstr;
#ifndef HAVE_INT64
# if SIZEOF_LONG == 8
# define HAVE_INT64 1
typedef unsigned long Uint64;
typedef long Sint64;
# ifdef ULONG_MAX
# define ERTS_UINT64_MAX ULONG_MAX
# endif
# ifdef LONG_MAX
# define ERTS_SINT64_MAX LONG_MAX
# endif
# ifdef LONG_MIN
# define ERTS_SINT64_MIN LONG_MIN
# endif
# elif SIZEOF_LONG_LONG == 8
# define HAVE_INT64 1
typedef unsigned long long Uint64;
typedef long long Sint64;
# ifdef ULLONG_MAX
# define ERTS_UINT64_MAX ULLONG_MAX
# endif
# ifdef LLONG_MAX
# define ERTS_SINT64_MAX LLONG_MAX
# endif
# ifdef LLONG_MIN
# define ERTS_SINT64_MIN LLONG_MIN
# endif
# else
# error "No 64-bit integer type found"
# endif
#endif
#ifndef ERTS_UINT64_MAX
# define ERTS_UINT64_MAX (~((Uint64) 0))
#endif
#ifndef ERTS_SINT64_MAX
# define ERTS_SINT64_MAX ((Sint64) ((((Uint64) 1) << 63)-1))
#endif
#ifndef ERTS_SINT64_MIN
# define ERTS_SINT64_MIN (-1*(((Sint64) 1) << 63))
#endif
#if SIZEOF_LONG == 4
typedef unsigned long Uint32;
typedef long Sint32;
#elif SIZEOF_INT == 4
typedef unsigned int Uint32;
typedef int Sint32;
#else
#error Found no appropriate type to use for 'Uint32' and 'Sint32'
#endif
#if SIZEOF_INT == 2
typedef unsigned int Uint16;
typedef int Sint16;
#elif SIZEOF_SHORT == 2
typedef unsigned short Uint16;
typedef short Sint16;
#else
#error Found no appropriate type to use for 'Uint16' and 'Sint16'
#endif
#if CHAR_BIT == 8
typedef unsigned char byte;
#else
#error Found no appropriate type to use for 'byte'
#endif
#if defined(ARCH_64) && !HAVE_INT64
#error 64-bit architecture, but no appropriate type to use for Uint64 and Sint64 found
#endif
#ifdef WORDS_BIGENDIAN
# define ERTS_HUINT_HVAL_HIGH 0
# define ERTS_HUINT_HVAL_LOW 1
#else
# define ERTS_HUINT_HVAL_HIGH 1
# define ERTS_HUINT_HVAL_LOW 0
#endif
#if ERTS_SIZEOF_TERM == 8
typedef union {
Uint val;
Uint32 hval[2];
} HUint;
#elif ERTS_SIZEOF_TERM == 4
typedef union {
Uint val;
Uint16 hval[2];
} HUint;
#else
#error "Unsupported size of term"
#endif
# define ERTS_EXTRA_DATA_ALIGN_SZ(X) \
(((size_t) 8) - (((size_t) (X)) & ((size_t) 7)))
#include "erl_lock_check.h"
/* needed by erl_smp.h */
int erts_send_warning_to_logger_str_nogl(char *);
#include "erl_smp.h"
#ifdef ERTS_WANT_BREAK_HANDLING
# ifdef ERTS_SMP
extern erts_smp_atomic32_t erts_break_requested;
# define ERTS_BREAK_REQUESTED \
((int) erts_smp_atomic32_read_nob(&erts_break_requested))
# else
extern volatile int erts_break_requested;
# define ERTS_BREAK_REQUESTED erts_break_requested
# endif
void erts_do_break_handling(void);
#endif
#ifdef ERTS_WANT_GOT_SIGUSR1
# ifndef UNIX
# define ERTS_GOT_SIGUSR1 0
# else
# ifdef ERTS_SMP
extern erts_smp_atomic32_t erts_got_sigusr1;
# define ERTS_GOT_SIGUSR1 ((int) erts_smp_atomic32_read_mb(&erts_got_sigusr1))
# else
extern volatile int erts_got_sigusr1;
# define ERTS_GOT_SIGUSR1 erts_got_sigusr1
# endif
# endif
#endif
#ifdef ERTS_SMP
extern erts_smp_atomic32_t erts_writing_erl_crash_dump;
extern erts_tsd_key_t erts_is_crash_dumping_key;
#define ERTS_SOMEONE_IS_CRASH_DUMPING \
((int) erts_smp_atomic32_read_mb(&erts_writing_erl_crash_dump))
#define ERTS_IS_CRASH_DUMPING \
((int) (SWord) erts_tsd_get(erts_is_crash_dumping_key))
#else
extern volatile int erts_writing_erl_crash_dump;
#define ERTS_SOMEONE_IS_CRASH_DUMPING erts_writing_erl_crash_dump
#define ERTS_IS_CRASH_DUMPING erts_writing_erl_crash_dump
#endif
/* Deal with memcpy() vs bcopy() etc. We want to use the mem*() functions,
but be able to fall back on bcopy() etc on systems that don't have
mem*(), but this doesn't work to well with memset()/bzero() - thus the
memzero() macro.
*/
/* xxxP */
#if defined(USE_BCOPY)
# define memcpy(a, b, c) bcopy((b), (a), (c))
# define memcmp(a, b, c) bcmp((a), (b), (c))
# define memzero(buf, len) bzero((buf), (len))
#else
# define memzero(buf, len) memset((buf), '\0', (len))
#endif
/* Stuff that is useful for port programs, drivers, etc */
#ifdef ISC32 /* Too much for the Makefile... */
# define signal sigset
# define NO_ASINH
# define NO_ACOSH
# define NO_ATANH
# define NO_FTRUNCATE
# define SIG_SIGHOLD
# define _POSIX_SOURCE
# define _XOPEN_SOURCE
#endif
#ifdef QNX /* Too much for the Makefile... */
# define SYS_SELECT_H
# define NO_ERF
# define NO_ERFC
/* This definition doesn't take NaN into account, but matherr() gets those */
# define isfinite(x) (fabs(x) != HUGE_VAL)
# define USE_MATHERR
# define HAVE_FINITE
#endif
#ifdef WANT_NONBLOCKING /* must define this to pull in fcntl.h/ioctl.h */
/* This is really a mess... We used to use fcntl O_NDELAY, but that seems
to only work on SunOS 4 - in particular, on SysV-based systems
(including Solaris 2), it does set non-blocking mode, but causes
read() to return 0!! fcntl O_NONBLOCK is specified by POSIX, and
seems to work on most systems, with the notable exception of AIX,
where the old ioctl FIONBIO is the *only* one that will set a *socket*
in non-blocking mode - and ioctl FIONBIO on AIX *doesn't* work for
pipes or ttys (O_NONBLOCK does)!!! For now, we'll use FIONBIO for AIX. */
# ifdef __WIN32__
static unsigned long zero_value = 0, one_value = 1;
# define SET_BLOCKING(fd) { if (ioctlsocket((fd), FIONBIO, &zero_value) != 0) fprintf(stderr, "Error setting socket to non-blocking: %d\n", WSAGetLastError()); }
# define SET_NONBLOCKING(fd) ioctlsocket((fd), FIONBIO, &one_value)
# else
# ifdef NB_FIONBIO /* Old BSD */
# include <sys/ioctl.h>
static const int zero_value = 0, one_value = 1;
# define SET_BLOCKING(fd) ioctl((fd), FIONBIO, &zero_value)
# define SET_NONBLOCKING(fd) ioctl((fd), FIONBIO, &one_value)
# define ERRNO_BLOCK EWOULDBLOCK
# else /* !NB_FIONBIO */
# include <fcntl.h>
# ifdef NB_O_NDELAY /* Nothing needs this? */
# define NB_FLAG O_NDELAY
# ifndef ERRNO_BLOCK /* allow override (e.g. EAGAIN) via Makefile */
# define ERRNO_BLOCK EWOULDBLOCK
# endif
# else /* !NB_O_NDELAY */ /* The True Way - POSIX!:-) */
# define NB_FLAG O_NONBLOCK
# define ERRNO_BLOCK EAGAIN
# endif /* !NB_O_NDELAY */
# define SET_BLOCKING(fd) fcntl((fd), F_SETFL, \
fcntl((fd), F_GETFL, 0) & ~NB_FLAG)
# define SET_NONBLOCKING(fd) fcntl((fd), F_SETFL, \
fcntl((fd), F_GETFL, 0) | NB_FLAG)
# endif /* !NB_FIONBIO */
# endif /* !__WIN32__ */
#endif /* WANT_NONBLOCKING */
__decl_noreturn void __noreturn erl_exit(int n, char*, ...);
/* Some special erl_exit() codes: */
#define ERTS_INTR_EXIT INT_MIN /* called from signal handler */
#define ERTS_ABORT_EXIT (INT_MIN + 1) /* no crash dump; only abort() */
#define ERTS_DUMP_EXIT (INT_MIN + 2) /* crash dump; then exit() */
#define ERTS_INTERNAL_ERROR(What) \
erl_exit(ERTS_ABORT_EXIT, "%s:%d:%s(): Internal error: %s\n", \
__FILE__, __LINE__, __func__, What)
Eterm erts_check_io_info(void *p);
/* Size of misc memory allocated from system dependent code */
Uint erts_sys_misc_mem_sz(void);
/* print stuff is declared here instead of in global.h, so sys stuff won't
have to include global.h */
#include "erl_printf.h"
/* Io constants to erts_print and erts_putc */
#define ERTS_PRINT_STDERR (2)
#define ERTS_PRINT_STDOUT (1)
#define ERTS_PRINT_INVALID (0) /* Don't want to use 0 since CBUF was 0 */
#define ERTS_PRINT_FILE (-1)
#define ERTS_PRINT_SBUF (-2)
#define ERTS_PRINT_SNBUF (-3)
#define ERTS_PRINT_DSBUF (-4)
#define ERTS_PRINT_MIN ERTS_PRINT_DSBUF
typedef struct {
char *buf;
size_t size;
} erts_print_sn_buf;
int erts_print(int to, void *arg, char *format, ...); /* in utils.c */
int erts_putc(int to, void *arg, char); /* in utils.c */
/* logger stuff is declared here instead of in global.h, so sys files
won't have to include global.h */
erts_dsprintf_buf_t *erts_create_logger_dsbuf(void);
int erts_send_info_to_logger(Eterm, erts_dsprintf_buf_t *);
int erts_send_warning_to_logger(Eterm, erts_dsprintf_buf_t *);
int erts_send_error_to_logger(Eterm, erts_dsprintf_buf_t *);
int erts_send_error_term_to_logger(Eterm, erts_dsprintf_buf_t *, Eterm);
int erts_send_info_to_logger_str(Eterm, char *);
int erts_send_warning_to_logger_str(Eterm, char *);
int erts_send_error_to_logger_str(Eterm, char *);
int erts_send_info_to_logger_nogl(erts_dsprintf_buf_t *);
int erts_send_warning_to_logger_nogl(erts_dsprintf_buf_t *);
int erts_send_error_to_logger_nogl(erts_dsprintf_buf_t *);
int erts_send_info_to_logger_str_nogl(char *);
/* needed by erl_smp.h (declared above)
int erts_send_warning_to_logger_str_nogl(char *); */
int erts_send_error_to_logger_str_nogl(char *);
typedef struct preload {
char *name; /* Name of module */
int size; /* Size of code */
unsigned char* code; /* Code pointer */
} Preload;
/*
* This structure contains options to all built in drivers.
* None of the drivers use all of the fields.
*/
typedef struct _SysDriverOpts {
Uint ifd; /* Input file descriptor (fd driver). */
Uint ofd; /* Outputfile descriptor (fd driver). */
int packet_bytes; /* Number of bytes in packet header. */
int read_write; /* Read and write bits. */
int use_stdio; /* Use standard I/O: TRUE or FALSE. */
int redir_stderr; /* Redirect stderr to stdout: TRUE/FALSE. */
int hide_window; /* Hide this windows (Windows). */
int exit_status; /* Report exit status of subprocess. */
int overlapped_io; /* Only has effect on windows NT et al */
char *envir; /* Environment of the port process, */
/* in Windows format. */
char **argv; /* Argument vector in Unix'ish format. */
char *wd; /* Working directory. */
unsigned spawn_type; /* Bitfield of ERTS_SPAWN_DRIVER |
ERTS_SPAWN_EXTERNAL | both*/
int parallelism; /* Optimize for parallelism */
} SysDriverOpts;
extern char *erts_default_arg0;
extern char os_type[];
typedef struct {
int have_os_monotonic_time;
int have_corrected_os_monotonic_time;
ErtsMonotonicTime os_monotonic_time_unit;
ErtsMonotonicTime sys_clock_resolution;
struct {
Uint64 resolution;
char *func;
char *clock_id;
int locked_use;
int extended;
} os_monotonic_time_info;
struct {
Uint64 resolution;
char *func;
char *clock_id;
int locked_use;
} os_system_time_info;
} ErtsSysInitTimeResult;
#define ERTS_SYS_INIT_TIME_RESULT_INITER \
{0, 0, (ErtsMonotonicTime) -1, (ErtsMonotonicTime) 1}
extern void erts_init_sys_time_sup(void);
extern void sys_init_time(ErtsSysInitTimeResult *);
extern void erts_late_sys_init_time(void);
extern void erts_deliver_time(void);
extern void erts_time_remaining(SysTimeval *);
extern void erts_sys_init_float(void);
extern void erts_thread_init_float(void);
extern void erts_thread_disable_fpe(void);
ERTS_GLB_INLINE int erts_block_fpe(void);
ERTS_GLB_INLINE void erts_unblock_fpe(int);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE int erts_block_fpe(void)
{
return erts_sys_block_fpe();
}
ERTS_GLB_INLINE void erts_unblock_fpe(int unmasked)
{
erts_sys_unblock_fpe(unmasked);
}
#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */
/* Dynamic library/driver loading */
typedef struct {
char* str;
}ErtsSysDdllError;
#define ERTS_SYS_DDLL_ERROR_INIT {NULL}
extern void erts_sys_ddll_free_error(ErtsSysDdllError*);
extern void erl_sys_ddll_init(void); /* to initialize mutexes etc */
extern int erts_sys_ddll_open(const char *path, void **handle, ErtsSysDdllError*);
extern int erts_sys_ddll_open_noext(char *path, void **handle, ErtsSysDdllError*);
extern int erts_sys_ddll_load_driver_init(void *handle, void **function);
extern int erts_sys_ddll_load_nif_init(void *handle, void **function,ErtsSysDdllError*);
extern int erts_sys_ddll_close2(void *handle, ErtsSysDdllError*);
#define erts_sys_ddll_close(H) erts_sys_ddll_close2(H,NULL)
extern void *erts_sys_ddll_call_init(void *function);
extern void *erts_sys_ddll_call_nif_init(void *function);
extern int erts_sys_ddll_sym2(void *handle, const char *name, void **function, ErtsSysDdllError*);
#define erts_sys_ddll_sym(H,N,F) erts_sys_ddll_sym2(H,N,F,NULL)
extern char *erts_sys_ddll_error(int code);
/*
* System interfaces for startup.
*/
void erts_sys_schedule_interrupt(int set);
#ifdef ERTS_SMP
void erts_sys_schedule_interrupt_timed(int, ErtsMonotonicTime);
void erts_sys_main_thread(void);
#endif
extern int erts_sys_prepare_crash_dump(int secs);
extern void erts_sys_pre_init(void);
extern void erl_sys_init(void);
extern void erl_sys_args(int *argc, char **argv);
extern void erl_sys_schedule(int);
void sys_tty_reset(int);
int sys_max_files(void);
void sys_init_io(void);
Preload* sys_preloaded(void);
unsigned char* sys_preload_begin(Preload*);
void sys_preload_end(Preload*);
int sys_get_key(int);
void elapsed_time_both(UWord *ms_user, UWord *ms_sys,
UWord *ms_user_diff, UWord *ms_sys_diff);
void wall_clock_elapsed_time_both(UWord *ms_total,
UWord *ms_diff);
void get_time(int *hour, int *minute, int *second);
void get_date(int *year, int *month, int *day);
void get_localtime(int *year, int *month, int *day,
int *hour, int *minute, int *second);
void get_universaltime(int *year, int *month, int *day,
int *hour, int *minute, int *second);
int seconds_to_univ(Sint64 seconds,
Sint *year, Sint *month, Sint *day,
Sint *hour, Sint *minute, Sint *second);
int univ_to_seconds(Sint year, Sint month, Sint day,
Sint hour, Sint minute, Sint second,
Sint64* seconds);
int univ_to_local(
Sint *year, Sint *month, Sint *day,
Sint *hour, Sint *minute, Sint *second);
int local_to_univ(Sint *year, Sint *month, Sint *day,
Sint *hour, Sint *minute, Sint *second, int isdst);
void get_now(Uint*, Uint*, Uint*);
struct ErtsSchedulerData_;
ErtsMonotonicTime erts_get_monotonic_time(struct ErtsSchedulerData_ *);
void get_sys_now(Uint*, Uint*, Uint*);
void set_break_quit(void (*)(void), void (*)(void));
void os_flavor(char*, unsigned);
void os_version(int*, int*, int*);
void init_getenv_state(GETENV_STATE *);
char * getenv_string(GETENV_STATE *);
void fini_getenv_state(GETENV_STATE *);
#define HAVE_ERTS_CHECK_IO_DEBUG
typedef struct {
int no_used_fds;
int no_driver_select_structs;
int no_driver_event_structs;
} ErtsCheckIoDebugInfo;
int erts_check_io_debug(ErtsCheckIoDebugInfo *ip);
int erts_sys_is_area_readable(char *start, char *stop);
/* xxxP */
#define SYS_DEFAULT_FLOAT_DECIMALS 20
void init_sys_float(void);
int sys_chars_to_double(char*, double*);
int sys_double_to_chars(double, char*, size_t);
int sys_double_to_chars_ext(double, char*, size_t, size_t);
int sys_double_to_chars_fast(double, char*, int, int, int);
void sys_get_pid(char *, size_t);
/* erts_sys_putenv() returns, 0 on success and a value != 0 on failure. */
int erts_sys_putenv(char *key, char *value);
/* Simple variant used from drivers, raw eightbit interface */
int erts_sys_putenv_raw(char *key, char *value);
/* erts_sys_getenv() returns 0 on success (length of value string in
*size), a value > 0 if value buffer is too small (*size is set to needed
size), and a value < 0 on failure. */
int erts_sys_getenv(char *key, char *value, size_t *size);
/* Simple variant used from drivers, raw eightbit interface */
int erts_sys_getenv_raw(char *key, char *value, size_t *size);
/* erts_sys_getenv__() is only allowed to be used in early init phase */
int erts_sys_getenv__(char *key, char *value, size_t *size);
/* erst_sys_unsetenv() returns 0 on success and a value != 0 on failure. */
int erts_sys_unsetenv(char *key);
/* Easier to use, but not as efficient, environment functions */
char *erts_read_env(char *key);
void erts_free_read_env(void *value);
#if defined(ERTS_THR_HAVE_SIG_FUNCS) && !defined(ETHR_UNUSABLE_SIGUSRX)
extern void sys_thr_resume(erts_tid_t tid);
extern void sys_thr_suspend(erts_tid_t tid);
#endif
/* utils.c */
/* Options to sys_alloc_opt */
#define SYS_ALLOC_OPT_TRIM_THRESHOLD 0
#define SYS_ALLOC_OPT_TOP_PAD 1
#define SYS_ALLOC_OPT_MMAP_THRESHOLD 2
#define SYS_ALLOC_OPT_MMAP_MAX 3
/* Default values to sys_alloc_opt options */
#define ERTS_DEFAULT_TRIM_THRESHOLD (128 * 1024)
#define ERTS_DEFAULT_TOP_PAD 0
#define ERTS_DEFAULT_MMAP_THRESHOLD (128 * 1024)
#define ERTS_DEFAULT_MMAP_MAX 64
int sys_alloc_opt(int, int);
typedef struct {
int trim_threshold;
int top_pad;
int mmap_threshold;
int mmap_max;
} SysAllocStat;
void sys_alloc_stat(SysAllocStat *);
#if defined(DEBUG) || defined(ERTS_ENABLE_LOCK_CHECK)
#undef ERTS_REFC_DEBUG
#define ERTS_REFC_DEBUG
#endif
typedef erts_smp_atomic_t erts_refc_t;
ERTS_GLB_INLINE void erts_refc_init(erts_refc_t *refcp, erts_aint_t val);
ERTS_GLB_INLINE void erts_refc_inc(erts_refc_t *refcp, erts_aint_t min_val);
ERTS_GLB_INLINE erts_aint_t erts_refc_inctest(erts_refc_t *refcp,
erts_aint_t min_val);
ERTS_GLB_INLINE void erts_refc_dec(erts_refc_t *refcp, erts_aint_t min_val);
ERTS_GLB_INLINE erts_aint_t erts_refc_dectest(erts_refc_t *refcp,
erts_aint_t min_val);
ERTS_GLB_INLINE void erts_refc_add(erts_refc_t *refcp, erts_aint_t diff,
erts_aint_t min_val);
ERTS_GLB_INLINE erts_aint_t erts_refc_read(erts_refc_t *refcp,
erts_aint_t min_val);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE void
erts_refc_init(erts_refc_t *refcp, erts_aint_t val)
{
erts_smp_atomic_init_nob((erts_smp_atomic_t *) refcp, val);
}
ERTS_GLB_INLINE void
erts_refc_inc(erts_refc_t *refcp, erts_aint_t min_val)
{
#ifdef ERTS_REFC_DEBUG
erts_aint_t val = erts_smp_atomic_inc_read_nob((erts_smp_atomic_t *) refcp);
if (val < min_val)
erl_exit(ERTS_ABORT_EXIT,
"erts_refc_inc(): Bad refc found (refc=%ld < %ld)!\n",
val, min_val);
#else
erts_smp_atomic_inc_nob((erts_smp_atomic_t *) refcp);
#endif
}
ERTS_GLB_INLINE erts_aint_t
erts_refc_inctest(erts_refc_t *refcp, erts_aint_t min_val)
{
erts_aint_t val = erts_smp_atomic_inc_read_nob((erts_smp_atomic_t *) refcp);
#ifdef ERTS_REFC_DEBUG
if (val < min_val)
erl_exit(ERTS_ABORT_EXIT,
"erts_refc_inctest(): Bad refc found (refc=%ld < %ld)!\n",
val, min_val);
#endif
return val;
}
ERTS_GLB_INLINE void
erts_refc_dec(erts_refc_t *refcp, erts_aint_t min_val)
{
#ifdef ERTS_REFC_DEBUG
erts_aint_t val = erts_smp_atomic_dec_read_nob((erts_smp_atomic_t *) refcp);
if (val < min_val)
erl_exit(ERTS_ABORT_EXIT,
"erts_refc_dec(): Bad refc found (refc=%ld < %ld)!\n",
val, min_val);
#else
erts_smp_atomic_dec_nob((erts_smp_atomic_t *) refcp);
#endif
}
ERTS_GLB_INLINE erts_aint_t
erts_refc_dectest(erts_refc_t *refcp, erts_aint_t min_val)
{
erts_aint_t val = erts_smp_atomic_dec_read_nob((erts_smp_atomic_t *) refcp);
#ifdef ERTS_REFC_DEBUG
if (val < min_val)
erl_exit(ERTS_ABORT_EXIT,
"erts_refc_dectest(): Bad refc found (refc=%ld < %ld)!\n",
val, min_val);
#endif
return val;
}
ERTS_GLB_INLINE void
erts_refc_add(erts_refc_t *refcp, erts_aint_t diff, erts_aint_t min_val)
{
#ifdef ERTS_REFC_DEBUG
erts_aint_t val = erts_smp_atomic_add_read_nob((erts_smp_atomic_t *) refcp, diff);
if (val < min_val)
erl_exit(ERTS_ABORT_EXIT,
"erts_refc_add(%ld): Bad refc found (refc=%ld < %ld)!\n",
diff, val, min_val);
#else
erts_smp_atomic_add_nob((erts_smp_atomic_t *) refcp, diff);
#endif
}
ERTS_GLB_INLINE erts_aint_t
erts_refc_read(erts_refc_t *refcp, erts_aint_t min_val)
{
erts_aint_t val = erts_smp_atomic_read_nob((erts_smp_atomic_t *) refcp);
#ifdef ERTS_REFC_DEBUG
if (val < min_val)
erl_exit(ERTS_ABORT_EXIT,
"erts_refc_read(): Bad refc found (refc=%ld < %ld)!\n",
val, min_val);
#endif
return val;
}
#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */
#ifdef ERTS_ENABLE_KERNEL_POLL
extern int erts_use_kernel_poll;
#endif
#define sys_memcpy(s1,s2,n) memcpy(s1,s2,n)
#define sys_memmove(s1,s2,n) memmove(s1,s2,n)
#define sys_memcmp(s1,s2,n) memcmp(s1,s2,n)
#define sys_memset(s,c,n) memset(s,c,n)
#define sys_memzero(s, n) memset(s,'\0',n)
#define sys_strcmp(s1,s2) strcmp(s1,s2)
#define sys_strncmp(s1,s2,n) strncmp(s1,s2,n)
#define sys_strcpy(s1,s2) strcpy(s1,s2)
#define sys_strncpy(s1,s2,n) strncpy(s1,s2,n)
#define sys_strlen(s) strlen(s)
/* define function symbols (needed in sys_drv_api) */
#define sys_fp_alloc sys_alloc
#define sys_fp_realloc sys_realloc
#define sys_fp_free sys_free
#define sys_fp_memcpy memcpy
#define sys_fp_memmove memmove
#define sys_fp_memcmp memcmp
#define sys_fp_memset memset
/* #define sys_fp_memzero elib_memzero */
#define sys_fp_strcmp strcmp
#define sys_fp_strncmp strncmp
#define sys_fp_strcpy strcpy
#define sys_fp_strncpy strncpy
#define sys_fp_strlen strlen
/* Return codes from the nb_read and nb_write functions */
#define FD_READY 1
#define FD_CONTINUE 2
#define FD_ERROR 3
/* Standard set of integer macros .. */
#define get_int64(s) (((Uint64)(((unsigned char*) (s))[0]) << 56) | \
(((Uint64)((unsigned char*) (s))[1]) << 48) | \
(((Uint64)((unsigned char*) (s))[2]) << 40) | \
(((Uint64)((unsigned char*) (s))[3]) << 32) | \
(((Uint64)((unsigned char*) (s))[4]) << 24) | \
(((Uint64)((unsigned char*) (s))[5]) << 16) | \
(((Uint64)((unsigned char*) (s))[6]) << 8) | \
(((Uint64)((unsigned char*) (s))[7])))
#define put_int64(i, s) do {((char*)(s))[0] = (char)((Sint64)(i) >> 56) & 0xff;\
((char*)(s))[1] = (char)((Sint64)(i) >> 48) & 0xff;\
((char*)(s))[2] = (char)((Sint64)(i) >> 40) & 0xff;\
((char*)(s))[3] = (char)((Sint64)(i) >> 32) & 0xff;\
((char*)(s))[4] = (char)((Sint64)(i) >> 24) & 0xff;\
((char*)(s))[5] = (char)((Sint64)(i) >> 16) & 0xff;\
((char*)(s))[6] = (char)((Sint64)(i) >> 8) & 0xff;\
((char*)(s))[7] = (char)((Sint64)(i)) & 0xff;\
} while (0)
#define get_int32(s) ((((unsigned char*) (s))[0] << 24) | \
(((unsigned char*) (s))[1] << 16) | \
(((unsigned char*) (s))[2] << 8) | \
(((unsigned char*) (s))[3]))
#define put_int32(i, s) do {((char*)(s))[0] = (char)((i) >> 24) & 0xff; \
((char*)(s))[1] = (char)((i) >> 16) & 0xff; \
((char*)(s))[2] = (char)((i) >> 8) & 0xff; \
((char*)(s))[3] = (char)(i) & 0xff;} \
while (0)
#define get_int24(s) ((((unsigned char*) (s))[0] << 16) | \
(((unsigned char*) (s))[1] << 8) | \
(((unsigned char*) (s))[2]))
#define put_int24(i, s) do {((char*)(s))[0] = (char)((i) >> 16) & 0xff; \
((char*)(s))[1] = (char)((i) >> 8) & 0xff; \
((char*)(s))[2] = (char)(i) & 0xff;} \
while (0)
#define get_int16(s) ((((unsigned char*) (s))[0] << 8) | \
(((unsigned char*) (s))[1]))
#define put_int16(i, s) do {((char*)(s))[0] = (char)((i) >> 8) & 0xff; \
((char*)(s))[1] = (char)(i) & 0xff;} \
while (0)
#define get_int8(s) ((((unsigned char*) (s))[0] ))
#define put_int8(i, s) do {((unsigned char*)(s))[0] = (i) & 0xff;} while (0)
/*
* Use DEBUGF as you would use printf, but use double parentheses:
*
* DEBUGF(("Error: %s\n", error));
*
* The output will appear in a special console.
*/
#ifdef DEBUG
void erl_debug(char* format, ...);
void erl_bin_write(unsigned char *, int, int);
# define DEBUGF(x) erl_debug x
#else
# define DEBUGF(x)
#endif
#ifdef __WIN32__
#ifdef ARCH_64
#define ERTS_ALLOC_ALIGN_BYTES 16
#define ERTS_SMALL_ABS(Small) _abs64(Small)
#else
#define ERTS_ALLOC_ALIGN_BYTES 8
#define ERTS_SMALL_ABS(Small) labs(Small)
#endif
#else
#define ERTS_ALLOC_ALIGN_BYTES 8
#define ERTS_SMALL_ABS(Small) labs(Small)
#endif
#ifndef ERTS_HAVE_ERTS_SYS_ALIGNED_ALLOC
# define ERTS_HAVE_ERTS_SYS_ALIGNED_ALLOC 0
#endif
#ifdef __WIN32__
void call_break_handler(void);
char* last_error(void);
char* win32_errorstr(int);
#endif
/************************************************************************
* Find out the native filename encoding of the process (look at locale of
* Unix processes and just do UTF16 on windows
************************************************************************/
#define ERL_FILENAME_UNKNOWN (0)
#define ERL_FILENAME_LATIN1 (1)
#define ERL_FILENAME_UTF8 (2)
#define ERL_FILENAME_UTF8_MAC (3)
#define ERL_FILENAME_WIN_WCHAR (4)
/************************************************************************
* If a filename in for example list_dir is not in the right encoding, it
* will be skipped in the resulting list, but depending on a startup setting
* we will inform the user in different ways. These macros define the
* different reactions to wrongly coded filenames. In the error case an
* exception will be thrown by prim_file.
************************************************************************/
#define ERL_FILENAME_WARNING_WARNING (0)
#define ERL_FILENAME_WARNING_IGNORE (1)
#define ERL_FILENAME_WARNING_ERROR (2)
/***********************************************************************
* The user can request a range of character that he/she consider
* printable. Currently this can be either latin1 or unicode, but
* in the future a set of ranges, or languages, could be specified.
***********************************************************************/
#define ERL_PRINTABLE_CHARACTERS_LATIN1 (0)
#define ERL_PRINTABLE_CHARACTERS_UNICODE (1)
int erts_get_native_filename_encoding(void);
/* The set function is only to be used by erl_init! */
void erts_set_user_requested_filename_encoding(int encoding, int warning);
int erts_get_user_requested_filename_encoding(void);
int erts_get_filename_warning_type(void);
/* This function is called from erl_init. The setting is read by BIF's
in io/io_lib. Setting is not atomic. */
void erts_set_printable_characters(int range);
/* Get the setting (ERL_PRINTABLE_CHARACTERS_{LATIN1|UNICODE} */
int erts_get_printable_characters(void);
void erts_init_sys_common_misc(void);
#endif
