initial checkin of switch_dso.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10215 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_dso.h

@@ -0,0 +1,53 @@
+/* 
+ * Cross Platform dso/dll load abstraction
+ * Copyright(C) 2008 Michael Jerris
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so.
+ *
+ * This work is provided under this license on an "as is" basis, without warranty of any kind,
+ * either expressed or implied, including, without limitation, warranties that the covered code
+ * is free of defects, merchantable, fit for a particular purpose or non-infringing. The entire
+ * risk as to the quality and performance of the covered code is with you. Should any covered
+ * code prove defective in any respect, you (not the initial developer or any other contributor)
+ * assume the cost of any necessary servicing, repair or correction. This disclaimer of warranty
+ * constitutes an essential part of this license. No use of any covered code is authorized hereunder
+ * except under this disclaimer. 
+ *
+ */
+
+
+#ifndef _SWITCH_DSO_H
+#define _SWITCH_DSO_H
+
+typedef void (*switch_func_ptr_t) (void);
+#ifdef WIN32
+typedef HINSTANCE switch_dso_lib_t;
+#else
+typedef void * switch_dso_lib_t;
+#endif
+#ifdef WIN32
+typedef FARPROC switch_dso_func_t;
+#else
+typedef void * switch_dso_func_t;
+#endif
+
+void switch_dso_destroy(switch_dso_lib_t *lib);
+switch_dso_lib_t switch_dso_open(const char *path, int global, char **err);
+switch_dso_func_t switch_dso_func_sym(switch_dso_lib_t lib, const char *sym, char **err);
+
+
+#endif
+
+/* For Emacs:
+ * Local Variables:
+ * mode:c
+ * indent-tabs-mode:t
+ * tab-width:4
+ * c-basic-offset:4
+ * End:
+ * For VIM:
+ * vim:set softtabstop=4 shiftwidth=4 tabstop=4
+ */
+

src/switch_dso.c

@@ -0,0 +1,114 @@
+/* 
+ * Cross Platform dso/dll load abstraction
+ * Copyright(C) 2008 Michael Jerris
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so.
+ *
+ * This work is provided under this license on an "as is" basis, without warranty of any kind,
+ * either expressed or implied, including, without limitation, warranties that the covered code
+ * is free of defects, merchantable, fit for a particular purpose or non-infringing. The entire
+ * risk as to the quality and performance of the covered code is with you. Should any covered
+ * code prove defective in any respect, you (not the initial developer or any other contributor)
+ * assume the cost of any necessary servicing, repair or correction. This disclaimer of warranty
+ * constitutes an essential part of this license. No use of any covered code is authorized hereunder
+ * except under this disclaimer. 
+ *
+ */
+
+#include <switch.h>
+#include "switch_dso.h"
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef WIN32
+
+void switch_dso_destroy(switch_dso_lib_t *lib) {
+	if (lib && *lib) {
+		FreeLibrary(*lib);
+		*lib = NULL;
+	}
+}
+
+switch_dso_lib_t switch_dso_open(const char *path, int global, char **err) {
+    HINSTANCE lib;
+	
+	lib = LoadLibraryEx(path, NULL, 0);
+
+	if (!lib) {
+		LoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
+	}
+
+	if (!lib) {
+		DWORD error = GetLastError();
+		*err = switch_mprintf("dll open error [%ul]\n", error);
+	}
+
+	return lib;
+}
+
+switch_dso_func_t switch_dso_func_sym(switch_dso_lib_t lib, const char *sym, char **err) {
+	FARPROC func = GetProcAddress(lib, sym);
+	if (!func) {
+		DWORD error = GetLastError();
+		*err = switch_mprintf("dll sym error [%ul]\n", error);
+	}
+	return func;
+}
+
+#else
+/*
+** {========================================================================
+** This is an implementation of loadlib based on the dlfcn interface.
+** The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
+** NetBSD, AIX 4.2, HPUX 11, and  probably most other Unix flavors, at least
+** as an emulation layer on top of native functions.
+** =========================================================================
+*/
+
+
+#include <dlfcn.h>
+
+void switch_dso_destroy(switch_dso_lib_t *lib) {
+	if (lib && *lib) {
+		dlclose(*lib);
+		*lib = NULL;
+	}
+}
+
+switch_dso_lib_t switch_dso_open(const char *path, int global, char **err) {
+	void *lib;
+	
+	if (global) {
+		lib = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
+	} else {
+		lib = dlopen(path, RTLD_NOW | RTLD_LOCAL);
+	}
+
+	if (lib == NULL) {
+		*err = strdup(dlerror());
+	}
+	return lib;
+}
+
+void *switch_dso_func_sym(switch_dso_lib_t lib, const char *sym, char **err) {
+	void *func = dlsym(lib, sym);
+	if (!func) {
+		*err = strdup(dlerror());
+	}
+	return func;
+}
+#endif
+/* }====================================================== */
+
+/* For Emacs:
+ * Local Variables:
+ * mode:c
+ * indent-tabs-mode:t
+ * tab-width:4
+ * c-basic-offset:4
+ * End:
+ * For VIM:
+ * vim:set softtabstop=4 shiftwidth=4 tabstop=4
+ */

w32/Library/FreeSwitchCore.2008.vcproj

@@ -408,6 +408,10 @@
 					/>
 				</FileConfiguration>
 			</File>
+			<File
+				RelativePath="..\..\src\switch_dso.c"
+				>
+			</File>
 			<File
 				RelativePath="..\..\src\switch_event.c"
 				>
@@ -570,6 +574,10 @@
 				RelativePath="..\..\src\include\switch_cpp.h"
 				>
 			</File>
+			<File
+				RelativePath="..\..\src\include\switch_dso.h"
+				>
+			</File>
 			<File
 				RelativePath="..\..\src\include\switch_event.h"
 				>