From 266e6709b70abf2fe1ccbbe10b36e112edd6319e Mon Sep 17 00:00:00 2001
From: Pixel <pixel@nobis-crew.org>
Date: Tue, 10 Nov 2009 15:14:03 -0800
Subject: Overhaul of the threading system. Removing it, that is.

---
 src/lua-interface.cpp | 120 ++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 92 insertions(+), 28 deletions(-)

(limited to 'src')

diff --git a/src/lua-interface.cpp b/src/lua-interface.cpp
index 3343b98..ee5f721 100644
--- a/src/lua-interface.cpp
+++ b/src/lua-interface.cpp
@@ -37,6 +37,7 @@
 #include <BLua.h>
 #include <LuaCommandLine.h>
 #include <HttpServ.h>
+#include <CopyJob.h>
 #include <MailServer.h>
 #include <Message.h>
 #include <Form.h>
@@ -521,8 +522,6 @@ Lua * start_basic_lua(bool nested = false) {
     LUAJIT_VERSION_SYM();
     Lua * L = new Lua();
 
-    L->lock();
-
     L->open_base();
     L->open_math();
     L->open_string();
@@ -536,8 +535,6 @@ Lua * start_basic_lua(bool nested = false) {
 
     L->SetPrinter(&lp_stderr);
 
-    L->unlock();
-    
     return L;
 }
 
@@ -638,13 +635,79 @@ class lua_interface_printer_t : public printer_t {
     Handle * log;
 };
 
-static void * interactive_prompt(void * __L) {
+static bool runlua(Lua * L, Buffer * command) {
+    try {
+        L->load(command);
+    }
+    catch (LuaException e) {
+        /* If there was an error, ignore it, and free the stack */
+        while(L->gettop())
+	    L->pop();
+        printm(M_ERROR, "%s\n", e.GetMsg());
+        return false;
+    }
+    catch (GeneralException e) {
+        /* A more severe exception... */
+	while(L->gettop())
+	    L->pop();
+        printm(M_ERROR, "Aborted. LUA caused the following exception: %s\n", e.GetMsg());
+        return false;
+    }
+    return true;
+}
+
+class PrompterTask : public Task {
+  public:
+      PrompterTask(Lua * L) : r(Socket::CreatePair()), w(r.GetPair()), c(0), L(L) {
+          r.SetNonBlock();
+          SetBurst();
+      }
+    int Do() throw (GeneralException) {
+        int len;
+
+        switch(current) {
+        case 3:
+            delete c;
+        case 0:
+            c = new CopyJob(&r, &b, 4);
+            WaitFor(c);
+            current = 1;
+            Suspend(TASK_ON_HOLD);
+        case 1:
+            delete c;
+            c = new CopyJob(&r, &b, b.readU32());
+            WaitFor(c);
+            current = 2;
+            Suspend(TASK_ON_HOLD);
+        case 2:
+            delete c;
+            b.writeU32(runlua(L, &b) ? 1 : 0);
+            c = new CopyJob(&b, &r, 4);
+            WaitFor(c);
+            current = 3;
+            Suspend(TASK_ON_HOLD);
+        }
+    }
+    Handle * GetWriter() { return &w; }
+  private:
+    Socket r, w;
+    Buffer b;
+    Task * c;
+    Lua * L;
+};
+
+struct interactive_prompt_data_t {
+    Lua * L;
+    Handle * w;
+};
+
+static void * interactive_prompt(void * __ipd) {
     char prompt[10], * line_read = 0;
     String line, endline;
     bool runit;
     Buffer command;
     int pos;
-    Lua * L = (Lua *) __L;
+    interactive_prompt_data_t * ipd = (interactive_prompt_data_t *) __ipd;
 
     /* Interactive mode loop */
     strcpy(prompt, "> ");
@@ -694,23 +757,17 @@ static void * interactive_prompt(void * __L) {
             }
 	    
 	    command << line;
+	    
+	    Uint32 got_error;
 	
 	    if (runit) {
-		try {
-		    L->load(&command);
+	        if (ipd->L) {
+	            got_error = runlua(ipd->L, &command) ? 1 : 0;
+	        } else {
+	            ipd->w->writeU32(command.GetRemaining());
+	            command.copyto(ipd->w);
+	            got_error = ipd->w->readU32();
 	        }
-		catch (LuaException e) {
-		    /* If there was an error, ignore it, and free the stack */
-		    while(L->gettop())
-			L->pop();
-                    printm(M_ERROR, "%s\n", e.GetMsg());
-	        }
-		catch (GeneralException e) {
-		    /* A more severe exception... */
-		    while(L->gettop())
-			L->pop();
-		    printm(M_ERROR, "Aborted. LUA caused the following exception: %s\n", e.GetMsg());
-		}
 		strcpy(prompt, "> ");
 	    } else {
 		strcpy(prompt, "- ");
@@ -720,6 +777,8 @@ static void * interactive_prompt(void * __L) {
 	}
     }
     
+    free(ipd);
+    
     return NULL;
 }
 
@@ -938,20 +997,25 @@ virtual int startup() throw (GeneralException) {
     }
 #endif
     
-    if (interactive) {
-        if (mserver || tserver || hserver) {
-    	    pthread_create(&interactive_thread, NULL, interactive_prompt, L);
-        } else {
-            interactive_prompt(L);
-        }
-    }
-
     if (mserver || hserver || tserver) {
 	TaskMan::Init();
         if (hserver)
 	    L->load(&Input(server_fname));
     }
 
+    if (interactive) {
+        interactive_prompt_data_t * ipd = (interactive_prompt_data_t *) malloc(sizeof(interactive_prompt_data_t));
+        if (mserver || tserver || hserver) {
+            ipd->w = (new PrompterTask(L))->GetWriter();
+            ipd->L = NULL;
+    	    pthread_create(&interactive_thread, NULL, interactive_prompt, ipd);
+        } else {
+            ipd->L = L;
+            ipd->w = NULL;
+            interactive_prompt(ipd);
+        }
+    }
+
     if (hserver) {
 	HttpServ * httpserv = new HttpServ(new Message("Welcome", "Welcome.", "start"), hport.to_int(), "Lua Interface");
 	new Form("LUACall", "luacallform", "Enter the function name to call", LUACall_Names, LUACall_Invites, LUACall_Defaults, LUACall_Lists, LUACall_Descs, 1, new LUACall(L));
-- 
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