clock_gettime: revert changes

parent b61dd749
......@@ -77,14 +77,7 @@ endif()
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
check_library_exists("dl" "dlopen" "" HAVE_LIBDL)
check_library_exists(rt "clock_gettime" "" HAVE_LIBRT)
if (HAVE_LIBRT)
set(HAVE_CLOCK_GETTIME 1)
else()
#might be defined in libc library as well
check_library_exists(c "clock_gettime" "" HAVE_CLOCK_GETTIME)
endif()
check_library_exists("rt" "clock_gettime" "" HAVE_LIBRT)
cmake_push_check_state(RESET)
check_symbol_exists("res_ndestroy" "resolv.h" HAVE_RES_NDESTROY)
......
/*
* Copyright (c), MM Weiss
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the MM Weiss nor the names of its contributors
* may be used to endorse or promote products derived from this software without
*
* 3. Neither the name of the MM Weiss nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
......@@ -32,13 +32,13 @@
* gcc -Wall -c clock_gettime_stub.c
* posix realtime functions; MacOS user space glue
*/
/* @comment
* other possible implementation using intel builtin rdtsc
* rdtsc-workaround: http://www.mcs.anl.gov/~kazutomo/rdtsc.html
*
*
* we could get the ticks by doing this
*
*
* __asm __volatile("mov %%ebx, %%esi\n\t"
* "cpuid\n\t"
* "xchg %%esi, %%ebx\n\t"
......@@ -46,37 +46,47 @@
* : "=a" (a),
* "=d" (d)
* );
* we could even replace our tricky sched_yield call by assembly code to get a better accurency,
* anyway the following C stub will satisfy 99% of apps using posix clock_gettime call,
* anyway the following C stub will satisfy 99% of apps using posix clock_gettime call,
* moreover, the setter version (clock_settime) could be easly written using mach primitives:
* http://www.opensource.apple.com/source/xnu/xnu-${VERSION}/osfmk/man/ (clock_[set|get]_time)
*
*
* hackers don't be crackers, don't you use a flush toilet?
*
*
*
* @see draft: ./posix-realtime-stub/posix-realtime-stub.c
*
*/
#include "clock_gettime.h"
#ifndef HAVE_CLOCK_GETTIME
#ifdef __APPLE__
#pragma weak clock_gettime
#include <sys/time.h>
#include <sys/resource.h>
#include <mach/mach.h>
#include <mach/clock.h>
#include <mach/mach_time.h>
#include <errno.h>
#include <unistd.h>
#include <sched.h>
#include "clock_gettime.h"
static mach_timebase_info_data_t __clock_gettime_inf;
static clock_serv_t belle_sip_calandar_clk;
static clock_serv_t belle_sip_system_clk;
static int belle_sip_clock_serv_ready=FALSE;
int clock_gettime(clockid_t clk_id, struct timespec *tp) {
int bc_clock_gettime(bc_clockid_t clk_id, struct timespec *tp) {
kern_return_t ret;
clock_serv_t clk_serv;
mach_timespec_t tm;
uint64_t start, end, delta, nano;
int retval = -1;
if (!belle_sip_clock_serv_ready) { /*host_get_clock_service is pretty slow*/
if (KERN_SUCCESS != host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &belle_sip_calandar_clk)
|| KERN_SUCCESS != host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &belle_sip_system_clk) ) {
......@@ -87,9 +97,9 @@ int clock_gettime(clockid_t clk_id, struct timespec *tp) {
}
switch (clk_id) {
case CLOCK_REALTIME:
case CLOCK_MONOTONIC:
clk_serv = (clk_id == CLOCK_REALTIME) ? belle_sip_calandar_clk : belle_sip_system_clk;
case BC_CLOCK_REALTIME:
case BC_CLOCK_MONOTONIC:
clk_serv = (clk_id == BC_CLOCK_REALTIME) ? belle_sip_calandar_clk : belle_sip_system_clk;
if (KERN_SUCCESS == (ret = clock_get_time(clk_serv, &tm))) {
tp->tv_sec = tm.tv_sec;
tp->tv_nsec = tm.tv_nsec;
......@@ -100,10 +110,10 @@ int clock_gettime(clockid_t clk_id, struct timespec *tp) {
retval = -1;
}
break;
case CLOCK_PROCESS_CPUTIME_ID:
case CLOCK_THREAD_CPUTIME_ID:
case BC_CLOCK_PROCESS_CPUTIME_ID:
case BC_CLOCK_THREAD_CPUTIME_ID:
start = mach_absolute_time();
if (clk_id == CLOCK_PROCESS_CPUTIME_ID) {
if (clk_id == BC_CLOCK_PROCESS_CPUTIME_ID) {
getpid();
} else {
sched_yield();
......
......@@ -19,38 +19,16 @@
#ifndef CLOCK_GETTIME_H_
#define CLOCK_GETTIME_H_
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_LIBRT /*configure defines HAVE_LIBRT with AC_CHECK_LIB*/
# ifndef HAVE_CLOCK_GETTIME
# define HAVE_CLOCK_GETTIME 1
#endif
#endif
#ifndef HAVE_CLOCK_GETTIME
#include <sys/time.h>
#include <sys/resource.h>
#include <mach/mach.h>
#include <mach/clock.h>
#include <mach/mach_time.h>
#include <errno.h>
#include <unistd.h>
#include <sched.h>
#ifdef __APPLE__
typedef enum {
CLOCK_REALTIME,
CLOCK_MONOTONIC,
CLOCK_PROCESS_CPUTIME_ID,
CLOCK_THREAD_CPUTIME_ID
} clockid_t;
BC_CLOCK_REALTIME,
BC_CLOCK_MONOTONIC,
BC_CLOCK_PROCESS_CPUTIME_ID,
BC_CLOCK_THREAD_CPUTIME_ID
} bc_clockid_t;
int clock_gettime(clockid_t clk_id, struct timespec *tp) ;
int bc_clock_gettime(bc_clockid_t clk_id, struct timespec *tp) ;
#endif
#endif /* CLOCK_GETTIME_H_ */
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