Fix memory leak in the pthreads thread local storage code

When a thread exits, we leak whatever is stored in thread local
variables, so install a destructor to free it.

diff --git a/pixman/pixman-compiler.h b/pixman/pixman-compiler.h
index f0f9d91..2b15cc3 100644 (file)
--- a/pixman/pixman-compiler.h
+++ b/pixman/pixman-compiler.h
@@ -72,9 +72,9 @@
 /* TLS */
 #if defined(PIXMAN_NO_TLS)
 
-#   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)            \
+#   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                      \
     static type name
-#   define PIXMAN_GET_THREAD_LOCAL(name)                \
+#   define PIXMAN_GET_THREAD_LOCAL(name)                               \
     (&name)
 
 #elif defined(TOOLCHAIN_SUPPORTS__THREAD)
@@ -165,9 +165,16 @@ extern __stdcall int ReleaseMutex (void *);
     static pthread_key_t tls_ ## name ## _key;                         \
                                                                        \
     static void                                                                \
+    tls_ ## name ## _destroy_value (void *value)                       \
+    {                                                                  \
+       free (value);                                                   \
+    }                                                                  \
+                                                                       \
+    static void                                                                \
     tls_ ## name ## _make_key (void)                                   \
     {                                                                  \
-       pthread_key_create (&tls_ ## name ## _key, NULL);               \
+       pthread_key_create (&tls_ ## name ## _key,                      \
+                           tls_ ## name ## _destroy_value);            \
     }                                                                  \
                                                                        \
     static type *                                                      \