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input/buffering: merge multiple exception handlers into RunThread()

This commit is contained in:
Max Kellermann 2019-05-17 11:23:30 +02:00
parent 302c0515b7
commit b5c7c16fb4
2 changed files with 15 additions and 52 deletions
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55
src/input/BufferingInputStream.cxx
View File

@ -135,7 +135,7 @@ BufferingInputStream::FindFirstHole() const noexcept
}
inline void
BufferingInputStream::RunThreadLocked(std::unique_lock<Mutex> &lock) noexcept
BufferingInputStream::RunThreadLocked(std::unique_lock<Mutex> &lock)
{
while (!stop) {
if (seek) {
@ -158,20 +158,7 @@ BufferingInputStream::RunThreadLocked(std::unique_lock<Mutex> &lock) noexcept
reading position to be able to fill our
buffer */
try {
input->Seek(lock, offset);
} catch (...) {
/* this is really a seek error, but we
register it as a read_error,
because seek_error is only checked
by Seek(), and at our frontend (our
own InputStream interface) is in
"read" mode */
read_error = std::current_exception();
client_cond.notify_all();
OnBufferAvailable();
break;
}
} else if (input->IsEOF()) {
/* our input has reached its end: prepare
reading the first remaining hole */
@ -183,14 +170,7 @@ BufferingInputStream::RunThreadLocked(std::unique_lock<Mutex> &lock) noexcept
}
/* seek to the first hole */
try {
input->Seek(lock, new_offset);
} catch (...) {
read_error = std::current_exception();
client_cond.notify_all();
OnBufferAvailable();
break;
}
} else if (input->IsAvailable()) {
const auto read_offset = input->GetOffset();
auto w = buffer.Write(read_offset);
@ -207,14 +187,7 @@ BufferingInputStream::RunThreadLocked(std::unique_lock<Mutex> &lock) noexcept
read completely */
break;
try {
input->Seek(lock, new_offset);
} catch (...) {
read_error = std::current_exception();
client_cond.notify_all();
OnBufferAvailable();
break;
}
} else {
/* we need more data at our
current position, because
@ -222,30 +195,14 @@ BufferingInputStream::RunThreadLocked(std::unique_lock<Mutex> &lock) noexcept
- seek our input to our
offset to prepare filling
the buffer from there */
try {
input->Seek(lock, offset);
} catch (...) {
read_error = std::current_exception();
client_cond.notify_all();
OnBufferAvailable();
break;
}
}
continue;
}
try {
size_t nbytes = input->Read(lock,
w.data, w.size);
buffer.Commit(read_offset,
read_offset + nbytes);
} catch (...) {
read_error = std::current_exception();
client_cond.notify_all();
OnBufferAvailable();
break;
}
size_t nbytes = input->Read(lock, w.data, w.size);
buffer.Commit(read_offset, read_offset + nbytes);
client_cond.notify_all();
OnBufferAvailable();
@ -261,7 +218,13 @@ BufferingInputStream::RunThread() noexcept
std::unique_lock<Mutex> lock(mutex);
try {
RunThreadLocked(lock);
} catch (...) {
read_error = std::current_exception();
client_cond.notify_all();
OnBufferAvailable();
}
/* clear the "input" attribute while holding the mutex */
auto _input = std::move(input);

2
src/input/BufferingInputStream.hxx
View File

@ -88,7 +88,7 @@ protected:
private:
size_t FindFirstHole() const noexcept;
void RunThreadLocked(std::unique_lock<Mutex> &lock) noexcept;
void RunThreadLocked(std::unique_lock<Mutex> &lock);
void RunThread() noexcept;
/* virtual methods from class InputStreamHandler */