Merge "Define _POSIX_MONOTONIC_CLOCK and implement sysconf(_SC_MONOTONIC_CLOCK)."
This commit is contained in:
Elliott Hughes
Gerrit Code Review
commit
fb62558bb4
@ -358,7 +358,7 @@ libc_upstream_netbsd_src_files := \
|
||||
#
|
||||
libc_static_common_src_files := \
|
||||
bionic/__errno.c \
|
||||
bionic/sysconf.c \
|
||||
bionic/sysconf.cpp \
|
||||
|
||||
# Architecture specific source files go here
|
||||
# =========================================================
|
||||
|
||||
346
libc/bionic/sysconf.cpp
Normal file
346
libc/bionic/sysconf.cpp
Normal file
@ -0,0 +1,346 @@
|
||||
/*
|
||||
* Copyright (C) 2008 The Android Open Source Project
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* * Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* * 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.
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <asm/page.h>
|
||||
#include <bionic_tls.h>
|
||||
#include <ctype.h>
|
||||
#include <dirent.h>
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <limits.h>
|
||||
#include <stdio.h> // For FOPEN_MAX.
|
||||
#include <string.h>
|
||||
#include <sys/sysconf.h>
|
||||
#include <time.h>
|
||||
#include <unistd.h>
|
||||
|
||||
/* seems to be the default on Linux, per the GLibc sources and my own digging */
|
||||
|
||||
#define SYSTEM_CLK_TCK 100
|
||||
#define SYSTEM_IOV_MAX 1024
|
||||
#define SYSTEM_DELAYTIMER_MAX 2147483647
|
||||
#define SYSTEM_MQ_OPEN_MAX 8
|
||||
#define SYSTEM_MQ_PRIO_MAX 32768
|
||||
#define SYSTEM_SEM_NSEMS_MAX 256
|
||||
#define SYSTEM_SEM_VALUE_MAX 0x3fffffff /* see bionic/semaphore.c */
|
||||
#define SYSTEM_SIGQUEUE_MAX 32
|
||||
#define SYSTEM_TIMER_MAX 32
|
||||
#define SYSTEM_LOGIN_NAME_MAX 256
|
||||
#define SYSTEM_TTY_NAME_MAX 32
|
||||
|
||||
/* the following depends on our implementation */
|
||||
#define SYSTEM_ATEXIT_MAX 65536 /* our implementation is unlimited */
|
||||
#define SYSTEM_THREAD_KEYS_MAX BIONIC_TLS_SLOTS
|
||||
#define SYSTEM_THREAD_STACK_MIN 32768 /* lower values may be possible, but be conservative */
|
||||
#define SYSTEM_THREAD_THREADS_MAX 2048 /* really unlimited */
|
||||
|
||||
#define SYSTEM_2_C_BIND _POSIX_VERSION /* Posix C binding version */
|
||||
#define SYSTEM_2_C_VER _POSIX2_C_VERSION
|
||||
#define SYSTEM_2_C_DEV -1 /* Posix C development tools unsupported on the device */
|
||||
#define SYSTEM_2_FORT_DEV -1 /* Fortran development unsupported */
|
||||
#define SYSTEM_2_FORT_RUN -1 /* Fortran runtime unsupported */
|
||||
#define SYSTEM_2_SW_DEV -1 /* posix software dev utilities unsupported */
|
||||
#define SYSTEM_2_LOCALEDEF -1 /* localedef() unimplemented */
|
||||
#define SYSTEM_2_UPE -1 /* No UPE for you ! (User Portability Utilities) */
|
||||
#define SYSTEM_2_VERSION -1 /* No posix command-line tools */
|
||||
|
||||
static bool __matches_cpuN(const char* s) {
|
||||
// The %c trick is to ensure that we have the anchored match "^cpu[0-9]+$".
|
||||
unsigned cpu;
|
||||
char dummy;
|
||||
return (sscanf(s, "cpu%u%c", &cpu, &dummy) == 1);
|
||||
}
|
||||
|
||||
static int __sysconf_nprocessors_conf() {
|
||||
// On x86 kernels you can use /proc/cpuinfo for this, but on ARM kernels offline CPUs disappear
|
||||
// from there. This method works on both.
|
||||
DIR* d = opendir("/sys/devices/system/cpu");
|
||||
if (!d) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
int result = 0;
|
||||
struct dirent* e;
|
||||
while ((e = readdir(d)) != NULL) {
|
||||
if (e->d_type == DT_DIR && __matches_cpuN(e->d_name)) {
|
||||
++result;
|
||||
}
|
||||
}
|
||||
closedir(d);
|
||||
return result;
|
||||
}
|
||||
|
||||
static int __sysconf_nprocessors_onln() {
|
||||
FILE* fp = fopen("/proc/stat", "r");
|
||||
if (fp == NULL) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
int result = 0;
|
||||
char buf[256];
|
||||
while (fgets(buf, sizeof(buf), fp) != NULL) {
|
||||
// Extract just the first word from the line.
|
||||
// 'cpu0 7976751 1364388 3116842 469770388 8629405 0 49047 0 0 0'
|
||||
char* p = strchr(buf, ' ');
|
||||
if (p != NULL) {
|
||||
*p = 0;
|
||||
}
|
||||
if (__matches_cpuN(buf)) {
|
||||
++result;
|
||||
}
|
||||
}
|
||||
fclose(fp);
|
||||
return result;
|
||||
}
|
||||
|
||||
static int __get_meminfo(const char* pattern) {
|
||||
FILE* fp = fopen("/proc/meminfo", "r");
|
||||
if (fp == NULL) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
int result = -1;
|
||||
char buf[256];
|
||||
while (fgets(buf, sizeof(buf), fp) != NULL) {
|
||||
long total;
|
||||
if (sscanf(buf, pattern, &total) == 1) {
|
||||
result = (int) (total / (PAGE_SIZE/1024));
|
||||
break;
|
||||
}
|
||||
}
|
||||
fclose(fp);
|
||||
return result;
|
||||
}
|
||||
|
||||
static int __sysconf_phys_pages() {
|
||||
return __get_meminfo("MemTotal: %ld kB");
|
||||
}
|
||||
|
||||
static int __sysconf_avphys_pages() {
|
||||
return __get_meminfo("MemFree: %ld kB");
|
||||
}
|
||||
|
||||
static int __sysconf_monotonic_clock() {
|
||||
timespec t;
|
||||
int rc = clock_getres(CLOCK_MONOTONIC, &t);
|
||||
return (rc == -1) ? -1 : _POSIX_VERSION;
|
||||
}
|
||||
|
||||
int sysconf(int name) {
|
||||
switch (name) {
|
||||
#ifdef _POSIX_ARG_MAX
|
||||
case _SC_ARG_MAX: return _POSIX_ARG_MAX;
|
||||
#endif
|
||||
#ifdef _POSIX2_BC_BASE_MAX
|
||||
case _SC_BC_BASE_MAX: return _POSIX2_BC_BASE_MAX;
|
||||
#endif
|
||||
#ifdef _POSIX2_BC_DIM_MAX
|
||||
case _SC_BC_DIM_MAX: return _POSIX2_BC_DIM_MAX;
|
||||
#endif
|
||||
#ifdef _POSIX2_BC_SCALE_MAX
|
||||
case _SC_BC_SCALE_MAX: return _POSIX2_BC_SCALE_MAX;
|
||||
#endif
|
||||
#ifdef _POSIX2_BC_STRING_MAX
|
||||
case _SC_BC_STRING_MAX: return _POSIX2_BC_STRING_MAX;
|
||||
#endif
|
||||
case _SC_CHILD_MAX: return CHILD_MAX;
|
||||
case _SC_CLK_TCK: return SYSTEM_CLK_TCK;
|
||||
#ifdef _POSIX2_COLL_WEIGHTS_MASK
|
||||
case _SC_COLL_WEIGHTS_MAX: return _POSIX2_COLL_WEIGHTS_MASK;
|
||||
#endif
|
||||
#ifdef _POSIX2_EXPR_NEST_MAX
|
||||
case _SC_EXPR_NEST_MAX: return _POSIX2_EXPR_NEST_MAX;
|
||||
#endif
|
||||
#ifdef _POSIX2_LINE_MAX
|
||||
case _SC_LINE_MAX: return _POSIX2_LINE_MAX;
|
||||
#endif
|
||||
case _SC_NGROUPS_MAX: return NGROUPS_MAX;
|
||||
case _SC_OPEN_MAX: return OPEN_MAX;
|
||||
//case _SC_PASS_MAX: return PASS_MAX;
|
||||
case _SC_2_C_BIND: return SYSTEM_2_C_BIND;
|
||||
case _SC_2_C_DEV: return SYSTEM_2_C_DEV;
|
||||
case _SC_2_C_VERSION: return SYSTEM_2_C_VER;
|
||||
//case _SC_2_CHAR_TERM: return ;
|
||||
case _SC_2_FORT_DEV: return SYSTEM_2_FORT_DEV;
|
||||
case _SC_2_FORT_RUN: return SYSTEM_2_FORT_RUN;
|
||||
case _SC_2_LOCALEDEF: return SYSTEM_2_LOCALEDEF;
|
||||
case _SC_2_SW_DEV: return SYSTEM_2_SW_DEV;
|
||||
case _SC_2_UPE: return SYSTEM_2_UPE;
|
||||
case _SC_2_VERSION: return SYSTEM_2_VERSION;
|
||||
#ifdef _POSIX_JOB_CONTROL
|
||||
case _SC_JOB_CONTROL: return _POSIX_JOB_CONTROL;
|
||||
#endif
|
||||
#ifdef _POSIX_SAVED_IDS
|
||||
case _SC_SAVED_IDS: return _POSIX_SAVED_IDS;
|
||||
#endif
|
||||
#ifdef _POSIX_VERSION
|
||||
case _SC_VERSION: return _POSIX_VERSION;
|
||||
#endif
|
||||
//case _SC_RE_DUP_<AX: return ;
|
||||
case _SC_STREAM_MAX: return FOPEN_MAX;
|
||||
//case _SC_TZNAME_MAX: return ;
|
||||
#if _XOPEN_CRYPT
|
||||
case _SC_XOPEN_CRYPT: return _XOPEN_CRYPT;
|
||||
#endif
|
||||
#ifdef _XOPEN_ENH_I18N
|
||||
case _SC_XOPEN_ENH_I18N: return _XOPEN_ENH_I18N;
|
||||
#endif
|
||||
#ifdef _XOPEN_SHM
|
||||
case _SC_XOPEN_SHM: return _XOPEN_SHM;
|
||||
#endif
|
||||
#ifdef _XOPEN_VERSION
|
||||
case _SC_XOPEN_VERSION: return _XOPEN_VERSION;
|
||||
#endif
|
||||
#ifdef _XOPEN_XCU_VERSION
|
||||
case _SC_XOPEN_XCU_VERSION: return _XOPEN_XCU_VERSION;
|
||||
#endif
|
||||
#ifdef _XOPEN_REALTIME
|
||||
case _SC_XOPEN_REALTIME: return _XOPEN_REALTIME;
|
||||
#endif
|
||||
#ifdef _XOPEN_REALTIME_THREADS
|
||||
case _SC_XOPEN_REALTIME_THREADS: return _XOPEN_REALTIME_THREADS;
|
||||
#endif
|
||||
#ifdef _XOPEN_LEGACY
|
||||
case _SC_XOPEN_LEGACY: return _XOPEN_LEGACY;
|
||||
#endif
|
||||
case _SC_ATEXIT_MAX: return SYSTEM_ATEXIT_MAX;
|
||||
case _SC_IOV_MAX: return SYSTEM_IOV_MAX;
|
||||
case _SC_PAGESIZE: return PAGE_SIZE;
|
||||
case _SC_PAGE_SIZE: return PAGE_SIZE;
|
||||
#ifdef _XOPEN_UNIX
|
||||
case _SC_XOPEN_UNIX: return _XOPEN_UNIX;
|
||||
#endif
|
||||
|
||||
// XXX: TODO: XBS5 nonsense
|
||||
|
||||
#ifdef AIO_LISTIO_MAX
|
||||
case _SC_AIO_LISTIO_MAX: return AIO_LISTIO_MAX;
|
||||
#endif
|
||||
#ifdef AIO_MAX
|
||||
case _SC_AIO_MAX: return AIO_MAX;
|
||||
#endif
|
||||
#ifdef AIO_PRIO_DELTA_MAX
|
||||
case _SC_AIO_PRIO_DELTA_MAX: return AIO_PRIO_DELTA_MAX;
|
||||
#endif
|
||||
case _SC_DELAYTIMER_MAX: return SYSTEM_DELAYTIMER_MAX;
|
||||
case _SC_MQ_OPEN_MAX: return SYSTEM_MQ_OPEN_MAX;
|
||||
case _SC_MQ_PRIO_MAX: return SYSTEM_MQ_PRIO_MAX;
|
||||
case _SC_RTSIG_MAX: return RTSIG_MAX;
|
||||
case _SC_SEM_NSEMS_MAX: return SYSTEM_SEM_NSEMS_MAX;
|
||||
case _SC_SEM_VALUE_MAX: return SYSTEM_SEM_VALUE_MAX;
|
||||
case _SC_SIGQUEUE_MAX: return SYSTEM_SIGQUEUE_MAX;
|
||||
case _SC_TIMER_MAX: return SYSTEM_TIMER_MAX;
|
||||
#ifdef _POSIX_ASYNCHRONOUS_IO
|
||||
case _SC_ASYNCHRONOUS_IO: return _POSIX_ASYNCHRONOUS_IO;
|
||||
#endif
|
||||
#ifdef _POSIX_FSYNC
|
||||
case _SC_FSYNC: return _POSIX_FSYNC;
|
||||
#endif
|
||||
#ifdef _POSIX_MAPPED_FILES
|
||||
case _SC_MAPPED_FILES: return _POSIX_MAPPED_FILES;
|
||||
#endif
|
||||
#ifdef _POSIX_MEMLOCK
|
||||
case _SC_MEMLOCK: return _POSIX_MEMLOCK;
|
||||
#endif
|
||||
#ifdef _POSIX_MEMLOCK_RANGE
|
||||
case _SC_MEMLOCK_RANGE: return _POSIX_MEMLOCK_RANGE
|
||||
#endif
|
||||
#ifdef _POSIX_MEMORY_PROTECTION
|
||||
case _SC_MEMORY_PROTECTION: return _POSIX_MEMORY_PROTECTION;
|
||||
#endif
|
||||
#ifdef _POSIX_MESSAGE_PASSING
|
||||
case _SC_MESSAGE_PASSING: return _POSIX_MESSAGE_PASSING;
|
||||
#endif
|
||||
#ifdef _POSIX_PRIORITIZED_IO
|
||||
case _SC_PRIORITIZED_IO: return _POSIX_PRIORITIZED_IO;
|
||||
#endif
|
||||
#ifdef _POSIX_PRIORITY_SCHEDULING
|
||||
case _SC_PRIORITY_SCHEDULING: return _POSIX_PRIORITY_SCHEDULING;
|
||||
#endif
|
||||
#ifdef _POSIX_REALTIME_SIGNALS
|
||||
case _SC_REALTIME_SIGNALS: return _POSIX_REALTIME_SIGNALS;
|
||||
#endif
|
||||
#ifdef _POSIX_SEMAPHORES
|
||||
case _SC_SEMAPHORES: return _POSIX_SEMAPHORES;
|
||||
#endif
|
||||
#ifdef _POSIX_SHARED_MEMORY_OBJECTS
|
||||
case _SC_SHARED_MEMORY_OBJECTS: return _POSIX_SHARED_MEMORY_OBJECTS;
|
||||
#endif
|
||||
#ifdef _POSIX_SYNCHRONIZED_IO
|
||||
case _SC_SYNCHRONIZED_IO: return _POSIX_SYNCHRONIZED_IO;
|
||||
#endif
|
||||
#ifdef _POSIX_TIMERS
|
||||
case _SC_TIMERS: return _POSIX_TIMERS;
|
||||
#endif
|
||||
|
||||
// GETGR_R_SIZE_MAX ?
|
||||
// GETPW_R_SIZE_MAX ?
|
||||
|
||||
case _SC_LOGIN_NAME_MAX: return SYSTEM_LOGIN_NAME_MAX;
|
||||
#ifdef _POSIX_THREAD_DESTRUCTOR_ITERATIONS
|
||||
case _SC_THREAD_DESTRUCTOR_ITERATIONS: return _POSIX_THREAD_DESTRUCTOR_ITERATIONS;
|
||||
#endif
|
||||
case _SC_THREAD_KEYS_MAX: return SYSTEM_THREAD_KEYS_MAX;
|
||||
case _SC_THREAD_STACK_MIN: return SYSTEM_THREAD_STACK_MIN;
|
||||
case _SC_THREAD_THREADS_MAX: return SYSTEM_THREAD_THREADS_MAX;
|
||||
case _SC_TTY_NAME_MAX: return SYSTEM_TTY_NAME_MAX;
|
||||
#ifdef _POSIX_THREADS
|
||||
case _SC_THREADS: return _POSIX_THREADS;
|
||||
#endif
|
||||
#ifdef _POSIX_THREAD_ATTR_STACKADDR
|
||||
case _SC_THREAD_ATTR_STACKADDR: return _POSIX_THREAD_ATTR_STACKADDR;
|
||||
#endif
|
||||
#ifdef _POSIX_THREAD_ATTR_STACKSIZE
|
||||
case _SC_THREAD_ATTR_STACKSIZE: return _POSIX_THREAD_ATTR_STACKSIZE;
|
||||
#endif
|
||||
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
|
||||
case _SC_THREAD_PRIORITY_SCHEDULING: return _POSIX_THREAD_PRIORITY_SCHEDULING;
|
||||
#endif
|
||||
#ifdef _POSIX_THREAD_PRIO_INHERIT
|
||||
case _SC_THREAD_PRIO_INHERIT: return _POSIX_THREAD_PRIO_INHERIT;
|
||||
#endif
|
||||
#ifdef _POSIX_THREAD_PRIO_PROTECT
|
||||
case _SC_THREAD_PRIO_PROTECT: return _POSIX_THREAD_PRIO_PROTECT;
|
||||
#endif
|
||||
#ifdef _POSIX_THREAD_SAFE_FUNCTIONS
|
||||
case _SC_THREAD_SAFE_FUNCTIONS: return _POSIX_THREAD_SAFE_FUNCTIONS
|
||||
#endif
|
||||
|
||||
case _SC_MONOTONIC_CLOCK: return __sysconf_monotonic_clock();
|
||||
case _SC_NPROCESSORS_CONF: return __sysconf_nprocessors_conf();
|
||||
case _SC_NPROCESSORS_ONLN: return __sysconf_nprocessors_onln();
|
||||
case _SC_PHYS_PAGES: return __sysconf_phys_pages();
|
||||
case _SC_AVPHYS_PAGES: return __sysconf_avphys_pages();
|
||||
|
||||
default:
|
||||
/* Posix says EINVAL is the only error that shall be returned,
|
||||
* but GLibc uses ENOSYS */
|
||||
errno = ENOSYS;
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
@ -169,7 +169,8 @@
|
||||
|
||||
#undef _POSIX_PROCESS_SHARED /* we don't support process-shared synchronization */
|
||||
#undef _POSIX_THREAD_SAFE_FUNCTIONS /* most functions are, but not everything yet */
|
||||
#define _POSIX_CHOWN_RESTRICTED 1 /* yes, chown requires appropriate priviledges */
|
||||
#define _POSIX_CHOWN_RESTRICTED 1 /* yes, chown requires appropriate privileges */
|
||||
#define _POSIX_MONOTONIC_CLOCK 0 /* the monotonic clock may be available; ask sysconf */
|
||||
#define _POSIX_NO_TRUNC 1 /* very long pathnames generate an error */
|
||||
#define _POSIX_SAVED_IDS 1 /* saved user ids is a Linux feature */
|
||||
#define _POSIX_JOB_CONTROL 1 /* job control is a Linux feature */
|
||||
|
||||
@ -127,8 +127,9 @@ __BEGIN_DECLS
|
||||
#define _SC_NPROCESSORS_ONLN 0x0061
|
||||
#define _SC_PHYS_PAGES 0x0062
|
||||
#define _SC_AVPHYS_PAGES 0x0063
|
||||
#define _SC_MONOTONIC_CLOCK 0x0064
|
||||
|
||||
extern int sysconf (int name);
|
||||
extern int sysconf(int name);
|
||||
|
||||
__END_DECLS
|
||||
|
||||
|
||||
@ -65,6 +65,7 @@ test_src_files = \
|
||||
stdlib_test.cpp \
|
||||
string_test.cpp \
|
||||
stubs_test.cpp \
|
||||
unistd_test.cpp \
|
||||
|
||||
test_dynamic_ldflags = -Wl,--export-dynamic -Wl,-u,DlSymTestFunction
|
||||
test_dynamic_src_files = \
|
||||
|
||||
23
tests/unistd_test.cpp
Normal file
23
tests/unistd_test.cpp
Normal file
@ -0,0 +1,23 @@
|
||||
/*
|
||||
* Copyright (C) 2012 The Android Open Source Project
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <gtest/gtest.h>
|
||||
|
||||
#include <unistd.h>
|
||||
|
||||
TEST(unistd, sysconf_SC_MONOTONIC_CLOCK) {
|
||||
ASSERT_GT(sysconf(_SC_MONOTONIC_CLOCK), 0);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user