Method GetBytesLeft

src/Platform/OutputMemory.cpp:396–408

Get the number of bytes left for continuous writing static*/

// Get the number of bytes left for continuous writing
/*static*/ size_t OutputBuffer::GetBytesLeft(const OutputBuffer *writingBuffer) noexcept
{
	const size_t freeBuffers = OUTPUT_BUFFER_COUNT - usedOutputBuffers;
	const size_t bytesLeft = OUTPUT_BUFFER_SIZE - writingBuffer->last->DataLength();

	if (freeBuffers < RESERVED_OUTPUT_BUFFERS)
	{
		// Keep some space left to encapsulate the responses (e.g. via an HTTP header)
		return bytesLeft;
	}

	return bytesLeft + (freeBuffers - RESERVED_OUTPUT_BUFFERS) * OUTPUT_BUFFER_SIZE;
}

// Truncate an output buffer to free up more memory. Returns the number of released bytes.
// This never releases the first buffer in the chain, so call it with a large value of bytesNeeded to release all buffers except the first.