From 759520a6f180a638027fdc7be58e12772247fe47 Mon Sep 17 00:00:00 2001
From: Nanang Izzuddin <nanang@teluu.com>
Date: Thu, 22 Mar 2012 11:29:20 +0000
Subject: Close #1466 (using PJLIB outside PJSUA-LIB context):  - static
 reference counter for PJLIB init/shutdown.  - implemented atexit() in PJMEDIA
 and PJSIP level: pjmedia_endpt_atexit() & pjsip_endpt_atexit().  - updated
 pjmedia/transport_srtp.c, pjsip/sip_timer.c, and pjsip/sip_replaces.c to use
 the new atexit() functions.  - API change: pjmedia_srtp_init_lib() now
 requires 'pjmedia_endpt' param.

git-svn-id: http://svn.pjsip.org/repos/pjproject/branches/1.x@3986 74dad513-b988-da41-8d7b-12977e46ad98
---
 pjlib/src/pj/os_core_symbian.cpp | 20 ++++++++++++++++++--
 pjlib/src/pj/os_core_unix.c      | 20 ++++++++++++++++++++
 pjlib/src/pj/os_core_win32.c     | 20 ++++++++++++++++++++
 3 files changed, 58 insertions(+), 2 deletions(-)

(limited to 'pjlib/src')

diff --git a/pjlib/src/pj/os_core_symbian.cpp b/pjlib/src/pj/os_core_symbian.cpp
index abf01b85..52733560 100644
--- a/pjlib/src/pj/os_core_symbian.cpp
+++ b/pjlib/src/pj/os_core_symbian.cpp
@@ -75,6 +75,9 @@ struct pj_sem_t
     int max;
 };
 
+/* Flag and reference counter for PJLIB instance */
+static int initialized;
+
 /* Flags to indicate which TLS variables have been used */
 static int tls_vars[PJ_MAX_TLS];
 
@@ -83,8 +86,6 @@ static unsigned atexit_count;
 static void (*atexit_func[32])(void);
 
 
-
-
 /////////////////////////////////////////////////////////////////////////////
 //
 // CPjTimeoutTimer implementation
@@ -335,6 +336,12 @@ PJ_DEF(pj_status_t) pj_init(void)
 	char stack_ptr;
     pj_status_t status;
     
+    /* Check if PJLIB have been initialized */
+    if (initialized) {
+	++initialized;
+	return PJ_SUCCESS;
+    }
+
     pj_ansi_strcpy(main_thread.obj_name, "pjthread");
 
     // Init main thread
@@ -368,6 +375,10 @@ PJ_DEF(pj_status_t) pj_init(void)
     stack_ptr = '\0';
 #endif
 
+    /* Flag PJLIB as initialized */
+    ++initialized;
+    pj_assert(initialized == 1);
+
     PJ_LOG(5,(THIS_FILE, "PJLIB initialized."));
     return PJ_SUCCESS;
 
@@ -390,6 +401,11 @@ PJ_DEF(pj_status_t) pj_atexit(pj_exit_callback func)
 
 PJ_DEF(void) pj_shutdown(void)
 {
+    /* Only perform shutdown operation when 'initialized' reaches zero */
+    pj_assert(initialized > 0);
+    if (--initialized != 0)
+	return;
+
     /* Call atexit() functions */
     while (atexit_count > 0) {
 	(*atexit_func[atexit_count-1])();
diff --git a/pjlib/src/pj/os_core_unix.c b/pjlib/src/pj/os_core_unix.c
index 3fcfa565..00087b64 100644
--- a/pjlib/src/pj/os_core_unix.c
+++ b/pjlib/src/pj/os_core_unix.c
@@ -102,6 +102,11 @@ struct pj_event_t
 #endif	/* PJ_HAS_EVENT_OBJ */
 
 
+/*
+ * Flag and reference counter for PJLIB instance.
+ */
+static int initialized;
+
 #if PJ_HAS_THREADS
     static pj_thread_t main_thread;
     static long thread_tls_id;
@@ -127,6 +132,12 @@ PJ_DEF(pj_status_t) pj_init(void)
     pj_str_t guid;
     pj_status_t rc;
 
+    /* Check if PJLIB have been initialized */
+    if (initialized) {
+	++initialized;
+	return PJ_SUCCESS;
+    }
+
 #if PJ_HAS_THREADS
     /* Init this thread's TLS. */
     if ((rc=pj_thread_init()) != 0) {
@@ -167,6 +178,10 @@ PJ_DEF(pj_status_t) pj_init(void)
     }
 #endif   
 
+    /* Flag PJLIB as initialized */
+    ++initialized;
+    pj_assert(initialized == 1);
+
     PJ_LOG(4,(THIS_FILE, "pjlib %s for POSIX initialized",
 	      PJ_VERSION));
 
@@ -192,6 +207,11 @@ PJ_DEF(void) pj_shutdown()
 {
     int i;
 
+    /* Only perform shutdown operation when 'initialized' reaches zero */
+    pj_assert(initialized > 0);
+    if (--initialized != 0)
+	return;
+
     /* Call atexit() functions */
     for (i=atexit_count-1; i>=0; --i) {
 	(*atexit_func[i])();
diff --git a/pjlib/src/pj/os_core_win32.c b/pjlib/src/pj/os_core_win32.c
index 2b7c2c91..55d7b1b9 100644
--- a/pjlib/src/pj/os_core_win32.c
+++ b/pjlib/src/pj/os_core_win32.c
@@ -116,6 +116,11 @@ struct pj_atomic_t
     long value;
 };
 
+/*
+ * Flag and reference counter for PJLIB instance.
+ */
+static int initialized;
+
 /*
  * Static global variables.
  */
@@ -142,6 +147,12 @@ PJ_DEF(pj_status_t) pj_init(void)
     pj_str_t guid;
     pj_status_t rc;
 
+    /* Check if PJLIB have been initialized */
+    if (initialized) {
+	++initialized;
+	return PJ_SUCCESS;
+    }
+
     /* Init Winsock.. */
     if (WSAStartup(MAKEWORD(2,0), &wsa) != 0) {
 	return PJ_RETURN_OS_ERROR(WSAGetLastError());
@@ -187,6 +198,10 @@ PJ_DEF(pj_status_t) pj_init(void)
     }
 #endif   
 
+    /* Flag PJLIB as initialized */
+    ++initialized;
+    pj_assert(initialized == 1);
+
     PJ_LOG(4,(THIS_FILE, "pjlib %s for win32 initialized",
 	      PJ_VERSION));
 
@@ -213,6 +228,11 @@ PJ_DEF(void) pj_shutdown()
 {
     int i;
 
+    /* Only perform shutdown operation when 'initialized' reaches zero */
+    pj_assert(initialized > 0);
+    if (--initialized != 0)
+	return;
+
     /* Display stack usage */
 #if defined(PJ_OS_HAS_CHECK_STACK) && PJ_OS_HAS_CHECK_STACK!=0
     {
-- 
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