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/*!A cross-platform build utility based on Lua
*
* 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.
*
* Copyright (C) 2015-present, Xmake Open Source Community.
*
* @author ruki
* @file meminfo.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "meminfo"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
#if defined(TB_CONFIG_OS_MACOSX)
#include <mach/mach.h>
#include <mach/machine.h>
#include <mach/vm_statistics.h>
#include <mach-o/dyld.h>
#include <mach-o/nlist.h>
#include <AvailabilityMacros.h>
#elif defined(TB_CONFIG_OS_LINUX)
#include <stdio.h>
#include <sys/sysinfo.h>
#elif defined(TB_CONFIG_OS_WINDOWS)
#include <windows.h>
#elif defined(TB_CONFIG_OS_BSD)
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
/* //////////////////////////////////////////////////////////////////////////////////////
* private implementation
*/
#ifdef TB_CONFIG_OS_LINUX
static tb_int64_t xm_os_meminfo_get_value(tb_char_t const *buffer, tb_char_t const *name) {
tb_char_t const *p = tb_strstr(buffer, name);
return p ? tb_stoi64(p + tb_strlen(name)) : 0;
}
#endif
// get the used memory size (MB)
static tb_bool_t xm_os_meminfo_stats(tb_int_t *ptotalsize, tb_int_t *pavailsize) {
#if defined(TB_CONFIG_OS_MACOSX)
vm_statistics64_data_t vmstat;
mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
if (host_statistics64(mach_host_self(), HOST_VM_INFO64, (host_info_t)&vmstat, &count) == KERN_SUCCESS) {
tb_int_t pagesize = (tb_int_t)tb_page_size();
tb_int64_t totalsize = (tb_int64_t)(vmstat.inactive_count + vmstat.free_count + vmstat.active_count +
vmstat.wire_count
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
+ vmstat.compressor_page_count
#endif
) *
pagesize;
/*
* NB: speculative pages are already accounted for in "free_count",
* so "speculative_count" is the number of "free" pages that are
* used to hold data that was read speculatively from disk but
* haven't actually been used by anyone so far.
*
*/
tb_int64_t availsize = (tb_int64_t)(vmstat.inactive_count + vmstat.free_count - vmstat.speculative_count) *
pagesize;
*ptotalsize = (tb_int_t)(totalsize / (1024 * 1024));
*pavailsize = (tb_int_t)(availsize / (1024 * 1024));
return tb_true;
}
#elif defined(TB_CONFIG_OS_LINUX)
/* we get meminfo from /proc/meminfo
*
* @see https://github.com/rfjakob/earlyoom/blob/cba1d599e4a7484c45ac017aa7702ff879f15846/meminfo.c#L52
*/
if (tb_file_info("/proc/meminfo", tb_null)) {
tb_bool_t ok = tb_false;
FILE *fp = fopen("/proc/meminfo", "r");
if (fp) {
// 8192 should be enough for the foreseeable future.
tb_char_t buffer[8192];
size_t len = fread(buffer, 1, sizeof(buffer) - 1, fp);
if (!ferror(fp) && len) {
tb_int64_t totalsize = xm_os_meminfo_get_value(buffer, "MemTotal:");
tb_int64_t availsize = xm_os_meminfo_get_value(buffer, "MemAvailable:");
if (availsize <= 0) {
tb_int64_t cachesize = xm_os_meminfo_get_value(buffer, "Cached:");
tb_int64_t freesize = xm_os_meminfo_get_value(buffer, "MemFree:");
tb_int64_t buffersize = xm_os_meminfo_get_value(buffer, "Buffers:");
tb_int64_t shmemsize = xm_os_meminfo_get_value(buffer, "Shmem:");
if (cachesize >= 0 && freesize >= 0 && buffersize >= 0 && shmemsize >= 0) {
availsize = freesize + buffersize + cachesize - shmemsize;
}
}
if (totalsize > 0 && availsize >= 0) {
*ptotalsize = (tb_int_t)(totalsize / 1024);
*pavailsize = (tb_int_t)(availsize / 1024);
ok = tb_true;
}
}
fclose(fp);
}
return ok;
} else {
struct sysinfo info = { 0 };
if (sysinfo(&info) == 0) {
*ptotalsize = (tb_int_t)(info.totalram / (1024 * 1024));
*pavailsize = (tb_int_t)((info.freeram + info.bufferram /* + cache size */) / (1024 * 1024));
return tb_true;
}
}
#elif defined(TB_CONFIG_OS_WINDOWS)
MEMORYSTATUSEX statex;
statex.dwLength = sizeof(statex);
if (GlobalMemoryStatusEx(&statex)) {
*ptotalsize = (tb_int_t)(statex.ullTotalPhys / (1024 * 1024));
*pavailsize = (tb_int_t)(statex.ullAvailPhys / (1024 * 1024));
return tb_true;
}
#elif defined(TB_CONFIG_OS_BSD) && !defined(__OpenBSD__)
unsigned long totalsize;
size_t size = sizeof(totalsize);
if (sysctlbyname("hw.physmem", &totalsize, &size, tb_null, 0) != 0) {
return tb_false;
}
// http://web.mit.edu/freebsd/head/usr.bin/systat/vmstat.c
tb_uint32_t v_free_count;
size = sizeof(v_free_count);
if (sysctlbyname("vm.stats.vm.v_free_count", &v_free_count, &size, tb_null, 0) != 0) {
return tb_false;
}
tb_uint32_t v_inactive_count;
size = sizeof(v_inactive_count);
if (sysctlbyname("vm.stats.vm.v_inactive_count", &v_inactive_count, &size, tb_null, 0) != 0) {
return tb_false;
}
*ptotalsize = (tb_int_t)(totalsize / (1024 * 1024));
*pavailsize = (tb_int_t)(((tb_int64_t)(v_free_count + v_inactive_count) * tb_page_size()) / (1024 * 1024));
return tb_true;
#endif
return tb_false;
}
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
tb_int_t xm_os_meminfo(lua_State *lua) {
tb_assert_and_check_return_val(lua, 0);
// init table
lua_newtable(lua);
// get the pagesize (bytes)
tb_int_t pagesize = (tb_int_t)tb_page_size();
lua_pushstring(lua, "pagesize");
lua_pushinteger(lua, pagesize);
lua_settable(lua, -3);
// get the memory size (MB)
tb_int_t availsize = 0;
tb_int_t totalsize = 0;
if (xm_os_meminfo_stats(&totalsize, &availsize)) {
lua_pushstring(lua, "totalsize");
lua_pushinteger(lua, totalsize);
lua_settable(lua, -3);
lua_pushstring(lua, "availsize");
lua_pushinteger(lua, availsize);
lua_settable(lua, -3);
}
return 1;
}
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