Aegisub/libaegisub/common/log.cpp
2014-06-29 10:45:26 -07:00

120 lines
3.6 KiB
C++

// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#include "libaegisub/log.h"
#include "libaegisub/cajun/elements.h"
#include "libaegisub/cajun/writer.h"
#include "libaegisub/dispatch.h"
#include "libaegisub/util.h"
#include <boost/filesystem/fstream.hpp>
#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/range/algorithm/remove_if.hpp>
#include <chrono>
namespace agi { namespace log {
/// Global log sink.
LogSink *log;
/// Short Severity ID
/// Keep this ordered the same as Severity
const char *Severity_ID = "EAWID";
LogSink::LogSink() : queue(dispatch::Create()) { }
LogSink::~LogSink() {
// The destructor for emitters may try to log messages, so disable all the
// emitters before destructing any
decltype(emitters) emitters_temp;
queue->Sync([&]{ swap(emitters_temp, emitters); });
}
void LogSink::Log(SinkMessage const& sm) {
queue->Async([=] {
if (messages.size() < 250)
messages.push_back(sm);
else {
messages[next_idx] = sm;
if (++next_idx == 250)
next_idx = 0;
}
for (auto& em : emitters) em->log(sm);
});
}
void LogSink::Subscribe(std::unique_ptr<Emitter> em) {
LOG_D("agi/log/emitter/subscribe") << "Subscribe: " << this;
auto tmp = em.release();
queue->Sync([=] { emitters.emplace_back(tmp); });
}
void LogSink::Unsubscribe(Emitter *em) {
queue->Sync([=] {
emitters.erase(
boost::remove_if(emitters, [=](std::unique_ptr<Emitter> const& e) { return e.get() == em; }),
emitters.end());
});
LOG_D("agi/log/emitter/unsubscribe") << "Un-Subscribe: " << this;
}
decltype(LogSink::messages) LogSink::GetMessages() const {
decltype(messages) ret;
queue->Sync([&] {
ret.reserve(messages.size());
ret.insert(ret.end(), messages.begin() + next_idx, messages.end());
ret.insert(ret.end(), messages.begin(), messages.begin() + next_idx);
});
return ret;
}
Message::Message(const char *section, Severity severity, const char *file, const char *func, int line)
: msg(buffer, sizeof buffer)
{
using namespace std::chrono;
sm.section = section;
sm.severity = severity;
sm.file = file;
sm.func = func;
sm.line = line;
sm.time = duration_cast<nanoseconds>(steady_clock::now().time_since_epoch()).count();
}
Message::~Message() {
sm.message = std::string(buffer, (std::string::size_type)msg.tellp());
agi::log::log->Log(sm);
}
JsonEmitter::JsonEmitter(fs::path const& directory)
: fp(new boost::filesystem::ofstream(unique_path(directory/util::strftime("%Y-%m-%d-%H-%M-%S-%%%%%%%%.json"))))
{
}
void JsonEmitter::log(SinkMessage const& sm) {
json::Object entry;
entry["sec"] = sm.time / 1000000000;
entry["usec"] = sm.time % 1000000000;
entry["severity"] = sm.severity;
entry["section"] = sm.section;
entry["file"] = sm.file;
entry["func"] = sm.func;
entry["line"] = sm.line;
entry["message"] = sm.message;
agi::JsonWriter::Write(entry, *fp);
fp->flush();
}
} }