remove deprecated ATOMIC_VAR_INIT() usage

It's deprecated in C17 [1]. Atomic initializers don't need this macro.

Even with std=gnu11, clang 14+ would issue a warning it's deprecated.

[1] https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2244.htm#dr_485

include/vlc_atomic.h

@@ -41,7 +41,7 @@ using std::memory_order_acq_rel;
 #include <time.h> /* vlc_atomic_timedwait_daytime */
 
 #define VLC_STATIC_RC { \
-    .refs = ATOMIC_VAR_INIT(0) \
+    .refs = 0 \
 }
 
 typedef struct vlc_atomic_rc_t {

include/vlc_threads.h

@@ -163,9 +163,9 @@ typedef struct
  * In C++, consider using a global ::vlc::threads::mutex instance instead.
  */
 #define VLC_STATIC_MUTEX { \
-    .value = ATOMIC_VAR_INIT(0), \
-    .recursion = ATOMIC_VAR_INIT(0), \
-    .owner = ATOMIC_VAR_INIT(0), \
+    .value = 0, \
+    .recursion = 0, \
+    .owner = 0, \
 }
 
 /**
@@ -527,7 +527,7 @@ typedef struct
 /**
  * Static initializer for one-time initialization.
  */
-#define VLC_STATIC_ONCE { ATOMIC_VAR_INIT(0) }
+#define VLC_STATIC_ONCE { 0 }
 
 /**
  * Begins a one-time initialization.

modules/codec/shine.c

@@ -67,7 +67,7 @@ vlc_module_begin()
     set_callback( OpenEncoder )
 vlc_module_end()
 
-static atomic_bool busy = ATOMIC_VAR_INIT(false);
+static atomic_bool busy = false;
 
 static int OpenEncoder( vlc_object_t *p_this )
 {

modules/gui/macosx/windows/video/VLCVideoOutputProvider.m

@@ -151,7 +151,7 @@ static void WindowUnsetFullscreen(vlc_window_t *wnd)
     WindowSetFullscreen(wnd, &windowed);
 }
 
-static atomic_bool b_intf_starting = ATOMIC_VAR_INIT(false);
+static atomic_bool b_intf_starting = false;
 
 static const struct vlc_window_operations ops = {
     WindowEnable,

modules/keystore/secret.c

@@ -300,7 +300,7 @@ check_service_running(void)
     /* Cache the return of this function that may take up to 200ms. This atomic
      * doesn't prevent a cache miss (unlikely). This function can be called
      * safely from any threads. */
-    static atomic_int cache_running = ATOMIC_VAR_INIT(0);
+    static atomic_int cache_running = 0;
     int running = atomic_load_explicit(&cache_running, memory_order_relaxed);
     if (running != 0)
         return running == 1 ? VLC_SUCCESS : VLC_EGENERIC;

src/config/core.c

@@ -41,7 +41,7 @@
 #include "misc/rcu.h"
 
 static vlc_mutex_t config_lock = VLC_STATIC_MUTEX;
-static atomic_bool config_dirty = ATOMIC_VAR_INIT(false);
+static atomic_bool config_dirty = false;
 
 void config_Lock(void)
 {

src/misc/cpu.c

@@ -146,7 +146,7 @@ out:
 
 unsigned vlc_CPU(void)
 {
-    static atomic_uint cpu_flags = ATOMIC_VAR_INIT(-1U);
+    static atomic_uint cpu_flags = -1U;
     unsigned flags = atomic_load_explicit(&cpu_flags, memory_order_relaxed);
 
     if (unlikely(flags == -1U)) {

src/misc/threads.h

@@ -51,7 +51,7 @@ typedef struct {
     atomic_ulong owner;
 } vlc_queuedmutex_t;
 
-#define VLC_STATIC_QUEUEDMUTEX { ATOMIC_VAR_INIT(0), ATOMIC_VAR_INIT(0), ATOMIC_VAR_INIT(0) }
+#define VLC_STATIC_QUEUEDMUTEX { 0, 0, 0 }
 
 void vlc_queuedmutex_init(vlc_queuedmutex_t *m);