add start of zap_dso abstraction

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@514 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/openzap/msvc/openzap.vcproj

@@ -42,7 +42,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories="../src/include;../src/isdn/include"
-				PreprocessorDefinitions="WIN32;_DEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="3"
@@ -110,7 +110,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="../src/include;../src/isdn/include"
-				PreprocessorDefinitions="WIN32;NDEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="2"
 				DisableLanguageExtensions="false"
 				RuntimeTypeInfo="false"
@@ -471,6 +471,10 @@
 					RelativePath="..\src\zap_config.c"
 					>
 				</File>
+				<File
+					RelativePath="..\src\zap_dso.c"
+					>
+				</File>
 				<File
 					RelativePath="..\src\zap_io.c"
 					>
@@ -533,6 +537,10 @@
 					RelativePath="..\src\include\zap_config.h"
 					>
 				</File>
+				<File
+					RelativePath="..\src\include\zap_dso.h"
+					>
+				</File>
 				<File
 					RelativePath="..\src\include\zap_threadmutex.h"
 					>

libs/openzap/src/include/zap_dso.h

@@ -0,0 +1,44 @@
+/* 
+ * 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 _ZAP_DSO_H
+#define _ZAP_DSO_H
+
+typedef void (*zap_func_ptr_t) (void);
+typedef void * zap_dso_lib_t;
+
+void zap_dso_destroy(zap_dso_lib_t *lib);
+zap_dso_lib_t zap_dso_open(const char *path, const char **err);
+zap_func_ptr_t zap_dso_func_sym(zap_dso_lib_t lib, const char *sym, const 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
+ */
+

libs/openzap/src/zap_dso.c

@@ -0,0 +1,66 @@
+/* 
+ * 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. 
+ *
+ */
+
+
+/*
+** {========================================================================
+** 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 zap_dso_destroy(zap_dso_lib_t *lib) {
+	if (lib) {
+		dlclose(lib);
+		lib = NULL;
+	}
+}
+
+zap_dso_lib_t zap_dso_open(const char *path, const char **err) {
+	void *lib = dlopen(path, RTLD_NOW | RTLD_LOCAL);
+	if (lib == NULL) {
+		*err = strdup(dlerror());
+	}
+	return lib;
+}
+
+zap_func_ptr_t zap_dso_func_sym(zap_dso_lib_t lib, const char *sym, const char **err) {
+	zap_dso_lib_t func = (zap_dso_lib_t)dlsym(lib, sym);
+	if (!func) {
+		*err = strdup(dlerror());
+	}
+	return func;
+}
+
+/* }====================================================== */
+
+/* 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
+ */