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https://github.com/eried/portapack-mayhem.git
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Methods to peek and skip messages in queue.
Allows receiver to not consume a message until after it's handled. And that enables the transmitter to block until the queue is empty, knowing that when unblocked, all messages in queue have been handled.
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c75c167c25
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@ -114,6 +114,26 @@ public:
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return len;
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}
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bool skip() {
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if( is_empty() ) {
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return false;
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}
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size_t len = peek_n();
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_out += len + recsize();
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return true;
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}
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size_t peek_r(void* const buf, size_t len) {
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if( is_empty() ) {
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return 0;
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}
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size_t n;
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len = out_copy_r((T*)buf, len, &n);
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return len;
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}
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size_t out_r(void* const buf, size_t len) {
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if( is_empty() ) {
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return 0;
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@ -47,6 +47,25 @@ public:
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return push(&message, sizeof(message));
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}
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template<typename T>
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bool push_and_wait(const T& message) {
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const bool result = push(message);
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if( result ) {
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// TODO: More graceful method of waiting for empty? Maybe sleep for a bit?
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while( !is_empty() );
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}
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return result;
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}
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Message* peek(std::array<uint8_t, Message::MAX_SIZE>& buf) {
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Message* const p = reinterpret_cast<Message*>(buf.data());
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return fifo.peek_r(buf.data(), buf.size()) ? p : nullptr;
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}
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bool skip() {
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return fifo.skip();
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}
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Message* pop(std::array<uint8_t, Message::MAX_SIZE>& buf) {
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Message* const p = reinterpret_cast<Message*>(buf.data());
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return fifo.out_r(buf.data(), buf.size()) ? p : nullptr;
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