1 /** \file BufferedLogCallback.cxx
2 * Buffer certain log messages permanently for later retrieval and display
5 // Copyright (C) 2013 James Turner zakalawe@mac.com
7 // This library is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU Library General Public
9 // License as published by the Free Software Foundation; either
10 // version 2 of the License, or (at your option) any later version.
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // Library General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
22 #include <simgear/debug/BufferedLogCallback.hxx>
24 #include <boost/foreach.hpp>
26 #include <simgear/sg_inlines.h>
27 #include <simgear/threads/SGThread.hxx>
28 #include <simgear/threads/SGGuard.hxx>
30 #include <cstdlib> // for malloc
35 class BufferedLogCallback::BufferedLogCallbackPrivate
39 vector_cstring m_buffer;
41 unsigned int m_maxLength;
44 BufferedLogCallback::BufferedLogCallback(sgDebugClass c, sgDebugPriority p) :
45 simgear::LogCallback(c,p),
46 d(new BufferedLogCallbackPrivate)
49 d->m_maxLength = 0xffff;
52 BufferedLogCallback::~BufferedLogCallback()
54 BOOST_FOREACH(unsigned char* msg, d->m_buffer) {
59 void BufferedLogCallback::operator()(sgDebugClass c, sgDebugPriority p,
60 const char* file, int line, const std::string& aMessage)
65 if (!shouldLog(c, p)) return;
67 vector_cstring::value_type msg;
68 if (aMessage.size() >= d->m_maxLength) {
69 msg = (vector_cstring::value_type) malloc(d->m_maxLength);
70 strncpy((char*) msg, aMessage.c_str(), d->m_maxLength - 1);
71 msg[d->m_maxLength - 1] = 0; // add final NULL byte
73 msg = (vector_cstring::value_type) strdup(aMessage.c_str());
76 SGGuard<SGMutex> g(d->m_mutex);
77 d->m_buffer.push_back(msg);
81 unsigned int BufferedLogCallback::stamp() const
86 unsigned int BufferedLogCallback::threadsafeCopy(vector_cstring& aOutput)
88 SGGuard<SGMutex> g(d->m_mutex);
89 size_t sz = d->m_buffer.size();
91 memcpy(aOutput.data(), d->m_buffer.data(), sz * sizeof(vector_cstring::value_type));
95 void BufferedLogCallback::truncateAt(unsigned int t)
100 } // of namespace simgear