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input/async: add attribute "postponed_exception"

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Will replace "postponed_error".
This commit is contained in:
Max Kellermann 2016-09-09 15:41:09 +02:00
parent 6ed77f2a27
commit 8092e18158
2 changed files with 11 additions and 0 deletions
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7
src/input/AsyncInputStream.cxx
View File

@ -88,6 +88,12 @@ AsyncInputStream::Resume()
bool
AsyncInputStream::Check(Error &error)
{
if (postponed_exception) {
auto e = std::move(postponed_exception);
postponed_exception = std::exception_ptr();
std::rethrow_exception(e);
}
bool success = !postponed_error.IsDefined();
if (!success) {
error = std::move(postponed_error);
@ -181,6 +187,7 @@ bool
AsyncInputStream::IsAvailable()
{
return postponed_error.IsDefined() ||
postponed_exception ||
IsEOF() ||
!buffer.IsEmpty();
}

4
src/input/AsyncInputStream.hxx
View File

@ -26,6 +26,8 @@
#include "util/CircularBuffer.hxx"
#include "util/Error.hxx"
#include <exception>
/**
* Helper class for moving asynchronous (non-blocking) InputStream
* implementations to the I/O thread. Data is being read into a ring
@ -67,6 +69,8 @@ class AsyncInputStream : public InputStream {
protected:
Error postponed_error;
std::exception_ptr postponed_exception;
public:
/**
* @param _buffer a buffer allocated with HugeAllocate(); the