threads: limit the number of automatic threads to MAX_AUTO_THREADS

[ffmpeg] / libavformat / network.c

diff --git a/libavformat/network.c b/libavformat/network.c
index f694614e8bef622c8a633b46b3a18916ed16a6eb..bfc34c72a73af3114f775214230ac09858c03cee 100644 (file)
--- a/libavformat/network.c
+++ b/libavformat/network.c
@@ -19,11 +19,120 @@
  */
 
 #include "network.h"
+#include "libavcodec/internal.h"
+
+#define THREADS (HAVE_PTHREADS || (defined(WIN32) && !defined(__MINGW32CE__)))
+
+#if THREADS
+#if HAVE_PTHREADS
+#include <pthread.h>
+#else
+#include "libavcodec/w32pthreads.h"
+#endif
+#endif
+
+#if CONFIG_OPENSSL
+#include <openssl/ssl.h>
+static int openssl_init;
+#if THREADS
+#include <openssl/crypto.h>
+#include "libavutil/avutil.h"
+pthread_mutex_t *openssl_mutexes;
+static void openssl_lock(int mode, int type, const char *file, int line)
+{
+    if (mode & CRYPTO_LOCK)
+        pthread_mutex_lock(&openssl_mutexes[type]);
+    else
+        pthread_mutex_unlock(&openssl_mutexes[type]);
+}
+#if !defined(WIN32) && OPENSSL_VERSION_NUMBER < 0x10000000
+static unsigned long openssl_thread_id(void)
+{
+    return (intptr_t) pthread_self();
+}
+#endif
+#endif
+#endif
+#if CONFIG_GNUTLS
+#include <gnutls/gnutls.h>
+#if THREADS && GNUTLS_VERSION_NUMBER <= 0x020b00
+#include <gcrypt.h>
+#include <errno.h>
+#undef malloc
+#undef free
+GCRY_THREAD_OPTION_PTHREAD_IMPL;
+#endif
+#endif
+
+void ff_tls_init(void)
+{
+    avpriv_lock_avformat();
+#if CONFIG_OPENSSL
+    if (!openssl_init) {
+        SSL_library_init();
+        SSL_load_error_strings();
+#if THREADS
+        if (!CRYPTO_get_locking_callback()) {
+            int i;
+            openssl_mutexes = av_malloc(sizeof(pthread_mutex_t) * CRYPTO_num_locks());
+            for (i = 0; i < CRYPTO_num_locks(); i++)
+                pthread_mutex_init(&openssl_mutexes[i], NULL);
+            CRYPTO_set_locking_callback(openssl_lock);
+#if !defined(WIN32) && OPENSSL_VERSION_NUMBER < 0x10000000
+            CRYPTO_set_id_callback(openssl_thread_id);
+#endif
+        }
+#endif
+    }
+    openssl_init++;
+#endif
+#if CONFIG_GNUTLS
+#if THREADS && GNUTLS_VERSION_NUMBER < 0x020b00
+    if (gcry_control(GCRYCTL_ANY_INITIALIZATION_P) == 0)
+        gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
+#endif
+    gnutls_global_init();
+#endif
+    avpriv_unlock_avformat();
+}
+
+void ff_tls_deinit(void)
+{
+    avpriv_lock_avformat();
+#if CONFIG_OPENSSL
+    openssl_init--;
+    if (!openssl_init) {
+#if THREADS
+        if (CRYPTO_get_locking_callback() == openssl_lock) {
+            int i;
+            CRYPTO_set_locking_callback(NULL);
+            for (i = 0; i < CRYPTO_num_locks(); i++)
+                pthread_mutex_destroy(&openssl_mutexes[i]);
+            av_free(openssl_mutexes);
+        }
+#endif
+    }
+#endif
+#if CONFIG_GNUTLS
+    gnutls_global_deinit();
+#endif
+    avpriv_unlock_avformat();
+}
+
+int ff_network_inited_globally;
 
 int ff_network_init(void)
 {
 #if HAVE_WINSOCK2_H
     WSADATA wsaData;
+#endif
+
+    if (!ff_network_inited_globally)
+        av_log(NULL, AV_LOG_WARNING, "Using network protocols without global "
+                                     "network initialization. Please use "
+                                     "avformat_network_init(), this will "
+                                     "become mandatory later.\n");
+#if HAVE_WINSOCK2_H
     if (WSAStartup(MAKEWORD(1,1), &wsaData))
         return 0;
 #endif