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Optimize: support for single log message bigger than muduo::detail::kLargeBuffer #702

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Optimize: support for single log message bigger than muduo::detail::kLargeBuffer #702

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51 changes: 33 additions & 18 deletions muduo/base/AsyncLogging.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -33,26 +33,12 @@ AsyncLogging::AsyncLogging(const string& basename,

void AsyncLogging::append(const char* logline, int len)
{
muduo::MutexLockGuard lock(mutex_);
if (currentBuffer_->avail() > len)
if (!running_)
{
currentBuffer_->append(logline, len);
}
else
{
buffers_.push_back(std::move(currentBuffer_));

if (nextBuffer_)
{
currentBuffer_ = std::move(nextBuffer_);
}
else
{
currentBuffer_.reset(new Buffer); // Rarely happens
}
currentBuffer_->append(logline, len);
cond_.notify();
return;
}
muduo::MutexLockGuard lock(mutex_);
append_unlocked(logline, len);
}

void AsyncLogging::threadFunc()
Expand Down Expand Up @@ -134,3 +120,32 @@ void AsyncLogging::threadFunc()
output.flush();
}

void AsyncLogging::append_unlocked(const char* buf, int len)
{
mutex_.assertLocked();
while (len > kBufferSize)
{
append_unlocked(buf, kBufferSize);
buf += kBufferSize;
len -= kBufferSize;
}
if (currentBuffer_->avail() > len)
{
currentBuffer_->append(buf, len);
}
else
{
buffers_.push_back(std::move(currentBuffer_));

if (nextBuffer_)
{
currentBuffer_ = std::move(nextBuffer_);
}
else
{
currentBuffer_.reset(new Buffer); // Rarely happens
}
currentBuffer_->append(buf, len);
cond_.notify();
}
}
4 changes: 3 additions & 1 deletion muduo/base/AsyncLogging.h
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Original file line number Diff line number Diff line change
Expand Up @@ -54,8 +54,10 @@ class AsyncLogging : noncopyable
private:

void threadFunc();
void append_unlocked(const char* buf, int len) REQUIRES(mutex_);

typedef muduo::detail::FixedBuffer<muduo::detail::kLargeBuffer> Buffer;
static const int kBufferSize = muduo::detail::kLargeBuffer;
typedef muduo::detail::FixedBuffer<kBufferSize> Buffer;
typedef std::vector<std::unique_ptr<Buffer>> BufferVector;
typedef BufferVector::value_type BufferPtr;

Expand Down