From ea6ae75fccad52d116559f320d6f0069c1ad552b Mon Sep 17 00:00:00 2001
From: Determinant <ted.sybil@gmail.com>
Date: Tue, 26 Mar 2019 03:59:47 -0400
Subject: use bounded send_buffer

---
 include/salticidae/buffer.h |  4 +++-
 include/salticidae/event.h  | 22 ++++++++++++++++++----
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/include/salticidae/buffer.h b/include/salticidae/buffer.h
index 3f415c9..2324d8b 100644
--- a/include/salticidae/buffer.h
+++ b/include/salticidae/buffer.h
@@ -131,7 +131,9 @@ struct MPSCWriteBuffer {
     }
   
     void push(bytearray_t &&data) {
-        buffer.enqueue(buffer_entry_t(std::move(data)));
+        buffer_entry_t d(std::move(data));
+        // TODO: better bounded buffer impl
+        while (!buffer.try_enqueue(d)) {}
     }
 
     bytearray_t move_pop() {
diff --git a/include/salticidae/event.h b/include/salticidae/event.h
index 649cfdd..fafa884 100644
--- a/include/salticidae/event.h
+++ b/include/salticidae/event.h
@@ -578,14 +578,28 @@ class MPSCQueueEventDriven: public MPSCQueue<T> {
     template<typename U>
     bool enqueue(U &&e) {
         static const uint64_t dummy = 1;
-        bool ret = MPSCQueue<T>::enqueue(std::forward<U>(e));
+        MPSCQueue<T>::enqueue(std::forward<U>(e));
         // memory barrier here, so any load/store in enqueue must be finialized
         if (wait_sig.exchange(false, std::memory_order_acq_rel))
         {
             SALTICIDAE_LOG_DEBUG("mpsc notify");
             write(fd, &dummy, 8);
         }
-        return ret;
+        return true;
+    }
+
+    template<typename U>
+    bool try_enqueue(U &&e) {
+        static const uint64_t dummy = 1;
+        if (!MPMCQueue<T>::try_enqueue(std::forward<U>(e)))
+            return false;
+        // memory barrier here, so any load/store in enqueue must be finialized
+        if (wait_sig.exchange(false, std::memory_order_acq_rel))
+        {
+            SALTICIDAE_LOG_DEBUG("mpsc notify");
+            write(fd, &dummy, 8);
+        }
+        return true;
     }
 };
 
@@ -629,14 +643,14 @@ class MPMCQueueEventDriven: public MPMCQueue<T> {
     template<typename U>
     bool enqueue(U &&e) {
         static const uint64_t dummy = 1;
-        bool ret = MPMCQueue<T>::enqueue(std::forward<U>(e));
+        MPMCQueue<T>::enqueue(std::forward<U>(e));
         // memory barrier here, so any load/store in enqueue must be finialized
         if (wait_sig.exchange(false, std::memory_order_acq_rel))
         {
             SALTICIDAE_LOG_DEBUG("mpsc notify");
             write(fd, &dummy, 8);
         }
-        return ret;
+        return true;
     }
 };
 
-- 
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