From 4440b13c359dab2c1ba55e31c604ac093172d68e Mon Sep 17 00:00:00 2001
From: Martin Sustrik <sustrik@250bpm.com>
Date: Fri, 26 Feb 2010 15:55:36 +0100
Subject: Poller object implemented in Java binding

---
 bindings/java/Poller.cpp | 126 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100755 bindings/java/Poller.cpp

(limited to 'bindings/java/Poller.cpp')

diff --git a/bindings/java/Poller.cpp b/bindings/java/Poller.cpp
new file mode 100755
index 0000000..bf7a043
--- /dev/null
+++ b/bindings/java/Poller.cpp
@@ -0,0 +1,126 @@
+/*
+    Copyright (c) 2007-2010 iMatix Corporation
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the Lesser GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    Lesser GNU General Public License for more details.
+
+    You should have received a copy of the Lesser GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <assert.h>
+#include <errno.h>
+
+#include "../c/zmq.h"
+
+#include "org_zmq_Poller.h"
+
+static void *fetch_socket (JNIEnv *env, jobject socket);
+
+JNIEXPORT jlong JNICALL Java_org_zmq_Poller_run_1poll (JNIEnv *env,
+                                                       jobject obj,
+                                                       jint count,
+                                                       jobjectArray socket_0mq,
+                                                       jshortArray event_0mq,
+                                                       jshortArray revent_0mq,
+                                                       jlong timeout)
+{
+    int ls = (int) count;
+    if (ls <= 0)
+        return 0;
+    
+    int ls_0mq = 0;
+    int le_0mq = 0;
+    int lr_0mq = 0;
+
+    if (socket_0mq)
+        ls_0mq = env->GetArrayLength (socket_0mq);
+    if (event_0mq)
+        le_0mq = env->GetArrayLength (event_0mq);
+    if (revent_0mq)
+        lr_0mq = env->GetArrayLength (revent_0mq);
+
+    if (ls > ls_0mq || ls > le_0mq || ls > ls_0mq)
+        return 0;
+
+    zmq_pollitem_t *pitem = new zmq_pollitem_t [ls];
+    short pc = 0;
+    int rc = 0;
+
+    //  Add 0MQ sockets.
+    if (ls_0mq > 0) {
+        jshort *e_0mq = env->GetShortArrayElements (event_0mq, 0);
+        if (e_0mq != NULL) {
+            for (int i = 0; i < ls_0mq; ++i) {
+                jobject s_0mq = env->GetObjectArrayElement (socket_0mq, i);
+                if (!s_0mq)
+                    continue;
+                void *s = fetch_socket (env, s_0mq);
+                if (!s)
+                    continue;
+                pitem [pc].socket = s;
+                pitem [pc].fd = 0;
+                pitem [pc].events = e_0mq [i];
+                pitem [pc].revents = 0;
+                ++pc;
+            }
+            env->ReleaseShortArrayElements(event_0mq, e_0mq, 0);
+        }
+    }
+
+    if (pc == ls) {
+        pc = 0;
+        long tout = (long) timeout;
+        rc = zmq_poll (pitem, ls, tout);
+    }
+
+    //  Set 0MQ results.
+    if (ls_0mq > 0) {
+        jshort *r_0mq = env->GetShortArrayElements (revent_0mq, 0);
+        if (r_0mq) {
+            for (int i = 0; i < ls_0mq; ++i) {
+                r_0mq [i] = pitem [pc].revents;
+                ++pc;
+            }
+            env->ReleaseShortArrayElements(revent_0mq, r_0mq, 0);
+        }
+    }
+
+    delete [] pitem;
+    return rc;
+}
+  
+/**
+ * Get the value of socketHandle for the specified Java Socket.
+ * TODO: move this to a single util.h file.
+ */
+static void *fetch_socket (JNIEnv *env, jobject socket)
+{
+    static jmethodID get_socket_handle_mid = NULL;
+
+    if (get_socket_handle_mid == NULL) {
+        jclass cls = env->GetObjectClass (socket);
+        assert (cls);
+        get_socket_handle_mid = env->GetMethodID (cls,
+            "getSocketHandle", "()J");
+        env->DeleteLocalRef (cls);
+        assert (get_socket_handle_mid);
+    }
+  
+    void *s = (void*) env->CallLongMethod (socket, get_socket_handle_mid);
+    if (env->ExceptionCheck ()) {
+        s = NULL;
+    }
+  
+    assert (s);
+    return s;
+}
-- 
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