From: Michael Tremer <michael.tremer@ipfire.org>
Date: Fri, 2 Feb 2018 12:18:37 +0000 (+0000)
Subject: libnetwork: Add central context object
X-Git-Tag: 010~177
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e8800488758e6ed9226654658060182057d6247;p=network.git

libnetwork: Add central context object

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/configure.ac b/configure.ac
index b2c06d0f..e9384872 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,6 +93,13 @@ CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS], [\
 	-Wl,-z,now])
 AC_SUBST([OUR_LDFLAGS], $with_ldflags)
 
+# ------------------------------------------------------------------------------
+
+AC_CHECK_HEADERS_ONCE([
+	errno.h
+	stdlib.h
+])
+
 # ------------------------------------------------------------------------------
 AC_ARG_WITH([systemdsystemunitdir],
 	AS_HELP_STRING([--with-systemdsystemunitdir=DIR], [Directory for systemd service files]),
diff --git a/src/libnetwork/libnetwork.c b/src/libnetwork/libnetwork.c
index 629a6b19..6793fd52 100644
--- a/src/libnetwork/libnetwork.c
+++ b/src/libnetwork/libnetwork.c
@@ -18,9 +18,51 @@
 #                                                                             #
 #############################################################################*/
 
+#include <errno.h>
+#include <stdlib.h>
+
 #include <network/libnetwork.h>
 #include "libnetwork-private.h"
 
+struct network_ctx {
+	int refcount;
+};
+
+NETWORK_EXPORT int network_new(struct network_ctx** ctx) {
+	struct network_ctx* c = calloc(1, sizeof(*c));
+	if (!c)
+		return -ENOMEM;
+
+	// Initialise basic variables
+	c->refcount = 1;
+
+	*ctx = c;
+	return 0;
+}
+
+NETWORK_EXPORT struct network_ctx* network_ref(struct network_ctx* ctx) {
+	if (!ctx)
+		return NULL;
+
+	ctx->refcount++;
+	return ctx;
+}
+
+static void network_free(struct network_ctx* ctx) {
+	// Nothing to do, yet
+}
+
+NETWORK_EXPORT struct network_ctx* network_unref(struct network_ctx* ctx) {
+	if (!ctx)
+		return NULL;
+
+	if (--ctx->refcount > 0)
+		return ctx;
+
+	network_free(ctx);
+	return NULL;
+}
+
 NETWORK_EXPORT const char* network_version() {
 	return "network " VERSION;
 }
diff --git a/src/libnetwork/libnetwork.sym b/src/libnetwork/libnetwork.sym
index 5a5a464a..8e884c96 100644
--- a/src/libnetwork/libnetwork.sym
+++ b/src/libnetwork/libnetwork.sym
@@ -1,5 +1,8 @@
 LIBNETWORK_0 {
 global:
+        network_new;
+        network_ref;
+        network_unref;
         network_version;
 local:
         *;
diff --git a/src/libnetwork/network/libnetwork.h b/src/libnetwork/network/libnetwork.h
index 615a6289..48f7e68c 100644
--- a/src/libnetwork/network/libnetwork.h
+++ b/src/libnetwork/network/libnetwork.h
@@ -21,6 +21,13 @@
 #ifndef LIBNETWORK_H
 #define LIBNETWORK_H
 
+// Central context for all network operations
+struct network_ctx;
+
+int network_new(struct network_ctx** ctx);
+struct network_ctx* network_ref(struct network_ctx* ctx);
+struct network_ctx* network_unref(struct network_ctx* ctx);
+
 const char* network_version();
 
 #endif