/*
* %CopyrightBegin%
*
* 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.
*
* %CopyrightEnd%
*
* This file handles differences between different Unix systems.
* This should be the only place with conditional compilation
* depending on the type of OS.
*/
#ifndef _ERL_OSE_SYS_H
#define _ERL_OSE_SYS_H
#include "ose.h"
#undef NIL
#include "ramlog.h"
#include "fcntl.h"
#include "math.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "sys/param.h"
#include "sys/time.h"
#include "time.h"
#include "dirent.h"
#include "ethread.h"
/* FIXME: configuration options */
#define ERTS_SCHED_MIN_SPIN
#define ERTS_SCHED_ONLY_POLL_SCHED_1
#define NO_SYSCONF 1
#define OPEN_MAX FOPEN_MAX
#define MAP_ANON MAP_ANONYMOUS
#ifndef HAVE_MMAP
# define HAVE_MMAP 0
#endif
#if HAVE_MMAP
# include "sys/mman.h"
#endif
typedef struct ErtsPollOseMsgList_ {
struct ErtsPollOseMsgList_ *next;
void *data;
} ErtsPollOseMsgList;
struct erts_sys_fd_type {
SIGSELECT signo;
int id;
ErtsPollOseMsgList *imsgs;
ErtsPollOseMsgList *omsgs;
ethr_mutex mtx;
};
/*
* Our own type of "FD's"
*/
#define ERTS_SYS_FD_TYPE struct erts_sys_fd_type*
#define NO_FSTAT_ON_SYS_FD_TYPE 1 /* They are signals, not files */
#include "sys/stat.h"
/* FIXME mremap is not defined in OSE - POSIX issue */
extern void *mremap (void *__addr, size_t __old_len, size_t __new_len,
int __flags, ...);
/* FIXME: mremap constants */
#define MREMAP_MAYMOVE 1
#define MREMAP_FIXED 2
typedef void *GETENV_STATE;
/*
** For the erl_timer_sup module.
*/
#define HAVE_GETHRTIME
typedef long long SysHrTime;
extern SysHrTime sys_gethrtime(void);
void sys_init_hrtime(void);
typedef time_t erts_time_t;
typedef struct timeval SysTimeval;
#define sys_gettimeofday(Arg) ((void) gettimeofday((Arg), NULL))
typedef struct {
clock_t tms_utime;
clock_t tms_stime;
clock_t tms_cutime;
clock_t tms_cstime;
} SysTimes;
extern int erts_ticks_per_sec;
#define SYS_CLK_TCK (erts_ticks_per_sec)
extern clock_t sys_times(SysTimes *buffer);
/* No use in having other resolutions than 1 Ms. */
#define SYS_CLOCK_RESOLUTION 1
#ifdef NO_FPE_SIGNALS
#define erts_get_current_fp_exception() NULL
#ifdef ERTS_SMP
#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_THOROUGH(fpexnp, f, Action) __ERTS_FP_ERROR(fpexnp, f, Action)
# define __ERTS_SAVE_FP_EXCEPTION(fpexnp)
# define __ERTS_RESTORE_FP_EXCEPTION(fpexnp)
#define erts_sys_block_fpe() 0
#define erts_sys_unblock_fpe(x) do{}while(0)
#else /* !NO_FPE_SIGNALS */
extern volatile unsigned long *erts_get_current_fp_exception(void);
#ifdef ERTS_SMP
extern void erts_thread_init_fp_exception(void);
#endif
# if (defined(__i386__) || defined(__x86_64__)) && defined(__GNUC__)
# define erts_fwait(fpexnp,f) \
__asm__ __volatile__("fwait" : "=m"(*(fpexnp)) : "m"(f))
# elif (defined(__powerpc__) || defined(__ppc__)) && defined(__GNUC__)
# define erts_fwait(fpexnp,f) \
__asm__ __volatile__("" : "=m"(*(fpexnp)) : "fm"(f))
# elif defined(__sparc__) && defined(__linux__) && defined(__GNUC__)
# define erts_fwait(fpexnp,f) \
__asm__ __volatile__("" : "=m"(*(fpexnp)) : "em"(f))
# else
# define erts_fwait(fpexnp,f) \
__asm__ __volatile__("" : "=m"(*(fpexnp)) : "g"(f))
# endif
# if (defined(__i386__) || defined(__x86_64__)) && defined(__GNUC__)
extern void erts_restore_fpu(void);
# else
# define erts_restore_fpu() /*empty*/
# endif
# if (!defined(__GNUC__) || \
(__GNUC__ < 2) || \
(__GNUC__ == 2 && __GNUC_MINOR < 96)) && \
!defined(__builtin_expect)
# define __builtin_expect(x, expected_value) (x)
# endif
static __inline__ int erts_check_fpe(volatile unsigned long *fp_exception, double f)
{
erts_fwait(fp_exception, f);
if (__builtin_expect(*fp_exception == 0, 1))
return 0;
*fp_exception = 0;
erts_restore_fpu();
return 1;
}
# undef erts_fwait
# undef erts_restore_fpu
extern void erts_fp_check_init_error(volatile unsigned long *fp_exception);
static __inline__ void __ERTS_FP_CHECK_INIT(volatile unsigned long *fp_exception)
{
if (__builtin_expect(*fp_exception == 0, 1))
return;
erts_fp_check_init_error(fp_exception);
}
# define __ERTS_FP_ERROR(fpexnp, f, Action) do { if (erts_check_fpe((fpexnp),(f))) { Action; } } while (0)
# define __ERTS_SAVE_FP_EXCEPTION(fpexnp) unsigned long old_erl_fp_exception = *(fpexnp)
# define __ERTS_RESTORE_FP_EXCEPTION(fpexnp) \
do { *(fpexnp) = old_erl_fp_exception; } while (0)
/* This is for library calls where we don't trust the external
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);
}
# define __ERTS_FP_ERROR_THOROUGH(fpexnp, f, Action) \
do { if (erts_check_fpe_thorough((fpexnp),(f))) { Action; } } while (0)
int erts_sys_block_fpe(void);
void erts_sys_unblock_fpe(int);
#endif /* !NO_FPE_SIGNALS */
#define ERTS_FP_CHECK_INIT(p) __ERTS_FP_CHECK_INIT(&(p)->fp_exception)
#define ERTS_FP_ERROR(p, f, A) __ERTS_FP_ERROR(&(p)->fp_exception, f, A)
#define ERTS_FP_ERROR_THOROUGH(p, f, A) __ERTS_FP_ERROR_THOROUGH(&(p)->fp_exception, f, A)
/* FIXME: force HAVE_GETPAGESIZE and stub getpagesize */
#ifndef HAVE_GETPAGESIZE
#define HAVE_GETPAGESIZE 1
#endif
extern int getpagesize(void);
#ifndef HZ
#define HZ 60
#endif
/* OSE5 doesn't provide limits.h so a number of macros should be
* added manually */
#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif
/* Minimum and maximum values a `signed int' can hold. */
#ifndef INT_MAX
#define INT_MAX 2147483647
#endif
#ifndef INT_MIN
#define INT_MIN (-INT_MAX - 1)
#endif
#ifndef UINT_MAX
# define UINT_MAX 4294967295U
#endif
#endif /* _ERL_OSE_SYS_H */
