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- // VirtualDub - Video processing and capture application
- // System library component
- // Copyright (C) 1998-2004 Avery Lee, All Rights Reserved.
- //
- // Beginning with 1.6.0, the VirtualDub system library is licensed
- // differently than the remainder of VirtualDub. This particular file is
- // thus licensed as follows (the "zlib" license):
- //
- // This software is provided 'as-is', without any express or implied
- // warranty. In no event will the authors be held liable for any
- // damages arising from the use of this software.
- //
- // Permission is granted to anyone to use this software for any purpose,
- // including commercial applications, and to alter it and redistribute it
- // freely, subject to the following restrictions:
- //
- // 1. The origin of this software must not be misrepresented; you must
- // not claim that you wrote the original software. If you use this
- // software in a product, an acknowledgment in the product
- // documentation would be appreciated but is not required.
- // 2. Altered source versions must be plainly marked as such, and must
- // not be misrepresented as being the original software.
- // 3. This notice may not be removed or altered from any source
- // distribution.
-
- #include "stdafx.h"
- #include <vd2/system/vdtypes.h>
- #include <list>
- #include <utility>
- #include <vd2/system/log.h>
- #include <vd2/system/thread.h>
- #include <vd2/system/VDString.h>
-
- namespace {
- wchar_t g_log[16384]; // 32K log
- int g_logHead, g_logTail;
- VDCriticalSection g_csLog;
-
- typedef std::list<std::pair<IVDLogger *, VDThreadID> > tVDLoggers;
- tVDLoggers g_loggers;
- }
-
- void VDLog(int severity, const VDStringW& s) {
- int strSize = s.size() + 1;
-
- if (strSize >= 16384) {
- VDASSERT(false);
- return;
- }
-
- vdsynchronized(g_csLog) {
- for(;;) {
- int currentSize = (g_logTail - g_logHead) & 16383;
-
- if (currentSize + strSize < 16384) // NOTE: This means that the last byte in the ring buffer can never be used.
- break;
-
- while(g_log[g_logHead++ & 16383])
- ;
-
- g_logHead &= 16383;
- }
-
- const wchar_t *ps = s.data();
-
- g_log[g_logTail++] = severity;
-
- for(int i=1; i<strSize; ++i)
- g_log[g_logTail++ & 16383] = *ps++;
-
- g_log[g_logTail++ & 16383] = 0;
-
- g_logTail &= 16383;
-
- VDThreadID currentThread = VDGetCurrentThreadID();
- for(tVDLoggers::const_iterator it(g_loggers.begin()), itEnd(g_loggers.end()); it!=itEnd; ++it) {
- if (!(*it).second || currentThread == (*it).second)
- (*it).first->AddLogEntry(severity, s);
- }
- }
- }
-
- void VDAttachLogger(IVDLogger *pLogger, bool bThisThreadOnly, bool bReplayLog) {
- vdsynchronized(g_csLog) {
- g_loggers.push_back(tVDLoggers::value_type(pLogger, bThisThreadOnly ? VDGetCurrentThreadID() : 0));
-
- if (bReplayLog) {
- int idx = g_logHead;
-
- while(idx != g_logTail) {
- int severity = g_log[idx++];
- int headidx = idx;
-
- idx &= 16383;
-
- for(;;) {
- wchar_t c = g_log[idx];
-
- idx = (idx+1) & 16383;
-
- if (!c)
- break;
- }
-
- if (idx > headidx) {
- pLogger->AddLogEntry(severity, VDStringW(g_log + headidx, idx-headidx-1));
- } else {
- VDStringW t(idx+16383-headidx);
-
- std::copy(g_log + headidx, g_log + 16384, const_cast<wchar_t *>(t.data()));
- std::copy(g_log, g_log + idx - 1, const_cast<wchar_t *>(t.data() + (16384 - headidx)));
- pLogger->AddLogEntry(severity, t);
- }
- }
- }
- }
- }
-
- void VDDetachLogger(IVDLogger *pLogger) {
- vdsynchronized(g_csLog) {
- for(tVDLoggers::iterator it(g_loggers.begin()), itEnd(g_loggers.end()); it!=itEnd; ++it) {
- if (pLogger == (*it).first) {
- g_loggers.erase(it);
- break;
- }
- }
- }
- }
-
- ///////////////////////////////////////////////////////////////////////////
- //
- // autologger
- //
- ///////////////////////////////////////////////////////////////////////////
-
- VDAutoLogger::VDAutoLogger(int min_severity)
- : mbAttached(true)
- , mMinSeverity(min_severity)
- {
- VDAttachLogger(this, false, false);
- }
-
- VDAutoLogger::~VDAutoLogger() {
- if (mbAttached)
- VDDetachLogger(this);
- }
-
- void VDAutoLogger::AddLogEntry(int severity, const VDStringW& s) {
- if (severity >= mMinSeverity)
- mEntries.push_back(Entry(severity, s));
- }
-
- const VDAutoLogger::tEntries& VDAutoLogger::GetEntries() {
- if (mbAttached) {
- VDDetachLogger(this);
- mbAttached = false;
- }
-
- return mEntries;
- }
-
-