Use fewer pointers refactor: eliminate some pointers in DrivenEngine

.claude/settings.local.json

@@ -1,23 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "WebFetch(domain:dev.epicgames.com)",
-      "WebFetch(domain:github.com)",
-      "Bash(grep:*)",
-      "WebSearch",
-      "Bash(clangd:*)",
-      "Bash(clangd-16:*)",
-      "Bash(ssh jyelon-office \"clangd --version 2>/dev/null || clangd-16 --version 2>/dev/null || clangd-18 --version 2>/dev/null || ls /usr/bin/clangd*\")",
-      "Bash(git check-ignore:*)",
-      "Bash(ls:*)",
-      "WebFetch(domain:ikrima.dev)",
-      "WebFetch(domain:indxzero.github.io)"
-    ],
-    "deny": [
-      "Bash(git commit *)",
-      "Bash(git push *)",
-      "Bash(rm -rf *)"
-    ],
-    "defaultMode": "acceptEdits"
-  }
-}

luprex/cpp/core/drivenengine.cpp

@@ -110,22 +110,20 @@ static DrivenEngine *make_engine(std::string_view kind) {
 //////////////////////////////////////////////////////////////////////////////
 //////////////////////////////////////////////////////////////////////////////
 
-Channel::Channel(DrivenEngine *de, int chid, int port, const eng::string &target, bool stop) {
+Channel::Channel(int chid, int port, const eng::string &target, bool stop) {
     chid_ = chid;
     port_ = port;
     closed_ = false;
     target_ = target;
     stop_driver_ = stop;
-    sb_in_ = eng::make_shared<StreamBuffer>();
-    sb_out_ = eng::make_shared<StreamBuffer>();
 }
 
 std::string_view Channel::peek_outgoing() const {
-    return sb_out_->view();
+    return sb_out_.view();
 }
 
 void Channel::sent_outgoing(int nbytes) {
-    sb_out_->read_bytes(nbytes);
+    sb_out_.read_bytes(nbytes);
 }
 
 //////////////////////////////////////////////////////////////////////////////
@@ -148,7 +146,7 @@ double DrivenEngine::get_clock() {
 SharedChannel DrivenEngine::new_outgoing_channel(const eng::string &target) {
     int chid = find_unused_chid();
     new_outgoing_.push_back(chid);
-    SharedChannel result = eng::make_shared<Channel>(this, chid, 0, target, stop_driver_);
+    SharedChannel result = eng::make_shared<Channel>(chid, 0, target, stop_driver_);
     channels_[chid] = result;
     return result;
 }
@@ -441,7 +439,7 @@ void DrivenEngine::drv_recv_incoming(uint32_t chid, uint32_t nbytes, const char
     if (nbytes > 0) {
         std::string_view sbytes(bytes, nbytes);
         Channel *ch = get_chid(chid);
-        ch->sb_in_->write_bytes(sbytes);
+        ch->sb_in_.write_bytes(sbytes);
     }
 }
 
@@ -454,7 +452,7 @@ void DrivenEngine::drv_notify_close(uint32_t chid, uint32_t len, const char *dat
 
 uint32_t DrivenEngine::drv_notify_accept(uint32_t port) {
     int chid = find_unused_chid();
-    channels_[chid] = eng::make_shared<Channel>(this, chid, port, "", stop_driver_);
+    channels_[chid] = eng::make_shared<Channel>(chid, port, "", stop_driver_);
     accepted_channels_.push_back(channels_[chid]);
     return chid;
 }

luprex/cpp/core/drivenengine.hpp

@@ -65,8 +65,8 @@ class Channel : public eng::opnew {
 public:
     // Get the buffers associated with this channel.
     //
-    StreamBuffer *out() { return sb_out_.get(); }
-    StreamBuffer *in() { return sb_in_.get(); }
+    StreamBuffer *out() { return &sb_out_; }
+    StreamBuffer *in() { return &sb_in_; }
 
     // The channel ID.  These are reused.
     //
@@ -96,7 +96,7 @@ public:
     // Channels are referenced by shared_ptr.  You can
     // release your shared_ptr at any time.
     //
-    Channel(DrivenEngine *de, int chid, int port, const eng::string &target, bool stop);
+    Channel(int chid, int port, const eng::string &target, bool stop);
     ~Channel() {};
     
 private:
@@ -110,8 +110,8 @@ private:
     int chid_;
 
     // These are the in/out buffers presented to the user.
-    std::shared_ptr<StreamBuffer> sb_in_;
-    std::shared_ptr<StreamBuffer> sb_out_;
+    StreamBuffer sb_in_;
+    StreamBuffer sb_out_;
 
     int port_;
     bool closed_;