adding IPC framework -- NOT PART OF THE BUILD

git-svn-id: svn://10.0.0.236/trunk@132767 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/modules/ipc/daemon/ipcModuleReg.cpp

@@ -0,0 +1,173 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "prlink.h"
+#include "prio.h"
+#include "plstr.h"
+
+#include "ipcConfig.h"
+#include "ipcModuleReg.h"
+#include "ipcModule.h"
+#include "ipcCommandModule.h"
+#include "ipcd.h"
+
+struct ipcModuleRegEntry
+{
+    nsID       id;
+    ipcModule *module;
+    PRLibrary *lib;
+};
+
+#define IPC_MAX_MODULE_COUNT 64
+
+static ipcModuleRegEntry ipcModules[IPC_MAX_MODULE_COUNT];
+static int ipcModuleCount;
+
+static PRStatus
+AddModule(const nsID &id, ipcModule *module, PRLibrary *lib)
+{
+    if (ipcModuleCount == IPC_MAX_MODULE_COUNT) {
+        printf("### too many modules!\n");
+        return PR_FAILURE;
+    }
+
+    ipcModules[ipcModuleCount].id = id;
+    ipcModules[ipcModuleCount].module = module;
+    ipcModules[ipcModuleCount].lib = lib;
+
+    ++ipcModuleCount;
+    return PR_SUCCESS;
+}
+
+static void
+InitModuleFromLib(const char *modulesDir, const char *fileName)
+{
+    printf("### InitModuleFromLib [%s]\n", fileName);
+
+    int dLen = strlen(modulesDir);
+    int fLen = strlen(fileName);
+
+    char *buf = (char *) malloc(dLen + 1 + fLen + 1);
+    memcpy(buf, modulesDir, dLen);
+    buf[dLen] = IPC_PATH_SEP_CHAR;
+    memcpy(buf + dLen + 1, fileName, fLen);
+    buf[dLen + 1 + fLen] = '\0';
+
+    PRLibrary *lib = PR_LoadLibrary(buf);
+    if (lib) {
+        ipcGetModuleListFunc func =
+            (ipcGetModuleListFunc) PR_FindFunctionSymbol(lib, "IPC_GetModuleList");
+        if (func) {
+            ipcModule **modules = func();
+            if (modules) {
+                while (*modules) {
+                    AddModule((*modules)->ID(), *modules, PR_LoadLibrary(buf));
+                    ++modules;
+                }
+            }
+        }
+        PR_UnloadLibrary(lib);
+    }
+
+    free(buf);
+}
+
+//-----------------------------------------------------------------------------
+// ipcModuleReg API
+//-----------------------------------------------------------------------------
+
+//
+// search for a module registered under the specified id
+//
+ipcModule *
+IPC_GetModuleByID(const nsID &id)
+{
+    for (int i=0; i<ipcModuleCount; ++i) {
+        ipcModuleRegEntry &entry = ipcModules[i];
+        if (entry.id.Equals(id))
+            return entry.module;
+    }
+    return NULL;
+}
+
+void
+IPC_InitModuleReg(const char *modulesDir)
+{
+    ipcModule *module = IPC_GetCommandModule();
+    AddModule(module->ID(), module, NULL);
+
+    if (modulesDir) {
+        printf("### loading libraries in %s\n", modulesDir);
+        // 
+        // scan directory for IPC modules
+        //
+        PRDir *dir = PR_OpenDir(modulesDir);
+        if (dir) {
+            PRDirEntry *ent;
+            while ((ent = PR_ReadDir(dir, PR_SKIP_BOTH)) != NULL) {
+                // 
+                // locate extension, and check if dynamic library
+                //
+                char *p = strrchr(ent->name, '.');
+                if (p && PL_strcasecmp(p, MOZ_DLL_SUFFIX) == 0)
+                    InitModuleFromLib(modulesDir, ent->name);
+            }
+            PR_CloseDir(dir);
+        }
+    }
+}
+
+void
+IPC_ShutdownModuleReg()
+{
+    //
+    // shutdown modules in reverse order    
+    //
+    for (int i = ipcModuleCount - 1; i >= 0; --i) {
+        ipcModuleRegEntry &entry = ipcModules[i];
+        if (entry.module)
+            entry.module->Shutdown();
+        if (entry.lib)
+            PR_UnloadLibrary(entry.lib);
+    }
+    // memset(ipcModules, 0, sizeof(ipcModules));
+    ipcModuleCount = 0;
+}