From 6946886c3c48b4df5a8c797a68814d0153bdea52 Mon Sep 17 00:00:00 2001
From: Thomas Grill <xovo@users.sourceforge.net>
Date: Sun, 6 Mar 2005 04:57:32 +0000
Subject: use new flext fifo use lock count instead of message queuing to avoid
 py->py messaging deadlock

svn path=/trunk/; revision=2599
---
 externals/grill/py/source/main.cpp | 68 ++++++++++----------------------------
 externals/grill/py/source/main.h   | 24 +++++---------
 2 files changed, 25 insertions(+), 67 deletions(-)

(limited to 'externals/grill/py')

diff --git a/externals/grill/py/source/main.cpp b/externals/grill/py/source/main.cpp
index a0919132..feabfde1 100644
--- a/externals/grill/py/source/main.cpp
+++ b/externals/grill/py/source/main.cpp
@@ -510,37 +510,37 @@ void py::work_wrapper(void *data)
 #ifdef FLEXT_THREADS
 bool py::qucall(PyObject *fun,PyObject *args)
 {
-    if(qufifo.Push(fun,args)) {
-        qucond.Signal();
-        return true;
-    }
-    else
-        return false;
+    FifoEl *el = qufifo.New();
+    el->Set(fun,args);
+    qufifo.Put(el);
+    qucond.Signal();
+    return true;
 }
 
 void py::threadworker()
 {
-    PyObject *fun,*args;
+    FifoEl *el;
     PyThreadState *state;
 
     while(!shouldexit) {
-        state = PyLock();
-        while(qufifo.Pop(fun,args)) {
-            callpy(fun,args);
-            Py_XDECREF(fun);
-            Py_XDECREF(args);
+        while(el = qufifo.Get()) {
+            state = PyLock();
+            callpy(el->fun,el->args);
+            Py_XDECREF(el->fun);
+            Py_XDECREF(el->args);
+            PyUnlock(state);
+            qufifo.Free(el);
         }
-        PyUnlock(state);
         qucond.Wait();
     }
 
     state = PyLock();
     // unref remaining Python objects
-    while(qufifo.Pop(fun,args)) {
-        Py_XDECREF(fun);
-        Py_XDECREF(args);
+    while(el = qufifo.Get()) {
+        Py_XDECREF(el->fun);
+        Py_XDECREF(el->args);
+        qufifo.Free(el);
     }
-
     PyUnlock(state);
 }
 #endif
@@ -575,37 +575,3 @@ bool py::collect()
     }
     return true;
 }
-
-Fifo::~Fifo()
-{
-    FifoEl *el = head;
-    head = tail = NULL; // reset it, in case there's a thread wanting to Pop
-    while(el) {
-        FifoEl *n = el->nxt;
-        delete el;
-        el = n;
-    }
-}
-
-bool Fifo::Push(PyObject *f,PyObject *a)
-{
-    FifoEl *el = new FifoEl;
-    el->fun = f;
-    el->args = a;
-    if(tail) tail->nxt = el;
-    else head = el;
-    tail = el;
-    return true;
-}
-
-bool Fifo::Pop(PyObject *&f,PyObject *&a)
-{
-    if(!head) return false;
-    FifoEl *el = head;
-    head = el->nxt;
-    f = el->fun;
-    a = el->args;
-    if(tail == el) tail = NULL;
-    delete el;
-    return true;
-}
diff --git a/externals/grill/py/source/main.h b/externals/grill/py/source/main.h
index e1ae64a4..cd1c3736 100644
--- a/externals/grill/py/source/main.h
+++ b/externals/grill/py/source/main.h
@@ -13,6 +13,7 @@ WARRANTIES, see the file, "license.txt," in this distribution.
 
 #include "pyprefix.h"
 #include "pysymbol.h"
+#include <flcontainers.h>
 
 #if FLEXT_OS == FLEXT_LINUX || FLEXT_OS == FLEXT_IRIX
 #include <unistd.h>
@@ -28,25 +29,16 @@ WARRANTIES, see the file, "license.txt," in this distribution.
 #define PY_STOP_TICK 10  // ms
 
 
-class Fifo
+
+class FifoEl
+    : public Fifo::Cell
 {
-protected:
-    struct FifoEl {
-        PyObject *fun;
-        PyObject *args;
-        FifoEl *nxt;
-    };
 public:
-    Fifo(): head(NULL),tail(NULL) {}
-    ~Fifo();
-
-    bool Push(PyObject *f,PyObject *a);
-    bool Pop(PyObject *&f,PyObject *&a);
-    
-protected:
-    FifoEl *head,*tail;
+    void Set(PyObject *f,PyObject *a) { fun = f,args = a; }
+    PyObject *fun,*args;
 };
 
+typedef PooledFifo<FifoEl> PyFifo;
 
 class py:
 	public flext_base
@@ -141,7 +133,7 @@ private:
 #ifdef FLEXT_THREADS
     bool qucall(PyObject *fun,PyObject *args);
     void threadworker();
-    Fifo qufifo;
+    PyFifo qufifo;
     ThrCond qucond;
 
     static PyThreadState *FindThreadState();
-- 
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