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Diffstat (limited to 'deps/v8/src/base/sys-info.cc')
-rw-r--r-- | deps/v8/src/base/sys-info.cc | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/deps/v8/src/base/sys-info.cc b/deps/v8/src/base/sys-info.cc new file mode 100644 index 0000000000..06c4f24eeb --- /dev/null +++ b/deps/v8/src/base/sys-info.cc @@ -0,0 +1,125 @@ +// Copyright 2014 the V8 project authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "src/base/sys-info.h" + +#if V8_OS_POSIX +#include <sys/resource.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/types.h> +#include <unistd.h> +#endif + +#if V8_OS_BSD +#include <sys/sysctl.h> +#endif + +#include <limits> + +#include "src/base/logging.h" +#include "src/base/macros.h" +#if V8_OS_WIN +#include "src/base/win32-headers.h" +#endif + +namespace v8 { +namespace base { + +// static +int SysInfo::NumberOfProcessors() { +#if V8_OS_OPENBSD + int mib[2] = {CTL_HW, HW_NCPU}; + int ncpu = 0; + size_t len = sizeof(ncpu); + if (sysctl(mib, arraysize(mib), &ncpu, &len, NULL, 0) != 0) { + UNREACHABLE(); + return 1; + } + return ncpu; +#elif V8_OS_POSIX + long result = sysconf(_SC_NPROCESSORS_ONLN); // NOLINT(runtime/int) + if (result == -1) { + UNREACHABLE(); + return 1; + } + return static_cast<int>(result); +#elif V8_OS_WIN + SYSTEM_INFO system_info = {0}; + ::GetNativeSystemInfo(&system_info); + return static_cast<int>(system_info.dwNumberOfProcessors); +#endif +} + + +// static +int64_t SysInfo::AmountOfPhysicalMemory() { +#if V8_OS_MACOSX + int mib[2] = {CTL_HW, HW_MEMSIZE}; + int64_t memsize = 0; + size_t len = sizeof(memsize); + if (sysctl(mib, arraysize(mib), &memsize, &len, NULL, 0) != 0) { + UNREACHABLE(); + return 0; + } + return memsize; +#elif V8_OS_FREEBSD + int pages, page_size; + size_t size = sizeof(pages); + sysctlbyname("vm.stats.vm.v_page_count", &pages, &size, NULL, 0); + sysctlbyname("vm.stats.vm.v_page_size", &page_size, &size, NULL, 0); + if (pages == -1 || page_size == -1) { + UNREACHABLE(); + return 0; + } + return static_cast<int64_t>(pages) * page_size; +#elif V8_OS_CYGWIN || V8_OS_WIN + MEMORYSTATUSEX memory_info; + memory_info.dwLength = sizeof(memory_info); + if (!GlobalMemoryStatusEx(&memory_info)) { + UNREACHABLE(); + return 0; + } + int64_t result = static_cast<int64_t>(memory_info.ullTotalPhys); + if (result < 0) result = std::numeric_limits<int64_t>::max(); + return result; +#elif V8_OS_QNX + struct stat stat_buf; + if (stat("/proc", &stat_buf) != 0) { + UNREACHABLE(); + return 0; + } + return static_cast<int64_t>(stat_buf.st_size); +#elif V8_OS_NACL + // No support for _SC_PHYS_PAGES, assume 2GB. + return static_cast<int64_t>(1) << 31; +#elif V8_OS_POSIX + long pages = sysconf(_SC_PHYS_PAGES); // NOLINT(runtime/int) + long page_size = sysconf(_SC_PAGESIZE); // NOLINT(runtime/int) + if (pages == -1 || page_size == -1) { + UNREACHABLE(); + return 0; + } + return static_cast<int64_t>(pages) * page_size; +#endif +} + + +// static +int64_t SysInfo::AmountOfVirtualMemory() { +#if V8_OS_NACL || V8_OS_WIN + return 0; +#elif V8_OS_POSIX + struct rlimit rlim; + int result = getrlimit(RLIMIT_DATA, &rlim); + if (result != 0) { + UNREACHABLE(); + return 0; + } + return (rlim.rlim_cur == RLIM_INFINITY) ? 0 : rlim.rlim_cur; +#endif +} + +} // namespace base +} // namespace v8 |