Martin Matuska
70 linhas
2.2 KiB
C++
70 linhas
2.2 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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*/
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#include "hphp/util/vdso.h"
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#define _GNU_SOURCE 1
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#include <dlfcn.h>
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namespace HPHP { namespace Util {
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///////////////////////////////////////////////////////////////////////////////
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static Vdso s_vdso;
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Vdso::Vdso() : m_handle(nullptr), m_clock_gettime_ns(nullptr) {
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m_handle = dlopen("linux-vdso.so.1", RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
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if (!m_handle) {
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return;
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}
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m_clock_gettime_ns =
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(int64_t (*)(clockid_t))dlsym(m_handle, "__vdso_clock_gettime_ns");
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m_clock_gettime =
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(int (*)(clockid_t, timespec *))dlsym(m_handle, "__vdso_clock_gettime");
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}
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Vdso::~Vdso() {
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if (m_handle) {
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dlclose(m_handle);
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}
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}
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int64_t Vdso::ClockGetTimeNS(int clk_id) {
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return s_vdso.clockGetTimeNS(clk_id);
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}
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int Vdso::ClockGetTime(int clk_id, timespec *ts) {
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return s_vdso.clockGetTime(clk_id, ts);
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}
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inline ALWAYS_INLINE int64_t Vdso::clockGetTimeNS(int clk_id) {
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if (m_clock_gettime_ns)
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return m_clock_gettime_ns(clk_id);
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return -1;
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}
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inline ALWAYS_INLINE int Vdso::clockGetTime(int clk_id, timespec *ts) {
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if (m_clock_gettime) {
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memset(ts, 0, sizeof(*ts));
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return m_clock_gettime(clk_id, ts);
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}
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////
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}}
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