whb: Add simplistic socket library manager.

* This manager counts how many times the program has requested the
socket library be initialized, so that the socket library is not
mistakenly closed while other things are still using sockets.
* WHBInitializeSocketLibrary will call socket_lib_init() and also keep a
count on how many times it has been called.
* WHBDeinitializeSocketLibrary will call socket_lib_finish(), but only
if it has been called as many times as WHBInitializeSocketLibrary.

src/libwhb/include/whb/socketinit.h

@@ -0,0 +1,23 @@
+#pragma once
+
+/**
+ * \defgroup whb_socketinit Socket Library Initialization Manager
+ * \ingroup whb
+ * @{
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void
+WHBInitializeSocketLibrary();
+
+void
+WHBDeinitializeSocketLibrary();
+
+#ifdef __cplusplus
+}
+#endif
+
+/** @} */

src/libwhb/src/log_udp.c

@@ -4,6 +4,7 @@
 #include <string.h>
 #include <whb/log.h>
 #include <whb/log_udp.h>
+#include <whb/socketinit.h>
 
 static int
 sSocket = -1;
@@ -28,7 +29,7 @@ BOOL
 WHBLogUdpInit()
 {
    int broadcastEnable = 1;
-   socket_lib_init();
+   WHBInitializeSocketLibrary();
 
    sSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (sSocket < 0) {
@@ -52,6 +53,6 @@ WHBLogUdpDeinit()
       return FALSE;
    }
 
-   socket_lib_finish();
+   WHBDeinitializeSocketLibrary();
    return WHBRemoveLogHandler(udpLogHandler);
 }

src/libwhb/src/socketinit.c

@@ -0,0 +1,29 @@
+#include <nsysnet/socket.h>
+
+static BOOL
+isSocketInitialized = FALSE;
+
+static unsigned int
+numberOfSocketClients = 0;
+
+void
+WHBInitializeSocketLibrary()
+{
+   if(!isSocketInitialized) {
+      isSocketInitialized = TRUE;
+      socket_lib_init();
+   }
+   numberOfSocketClients++;
+}
+
+void
+WHBDeinitializeSocketLibrary()
+{
+   if(numberOfSocketClients > 0) {
+      numberOfSocketClients--;
+   }
+   if(isSocketInitialized && numberOfSocketClients == 0) {
+      isSocketInitialized = FALSE;
+      socket_lib_finish();
+   }
+}