Fix -Wundef warnings due to use of unguarded SDL_THREADS_DISABLED

src/core/linux/SDL_threadprio.c

@@ -22,7 +22,7 @@
 
 #ifdef __LINUX__
 
-#if !SDL_THREADS_DISABLED
+#ifndef SDL_THREADS_DISABLED
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <pthread.h>
@@ -251,7 +251,7 @@ static SDL_bool rtkit_setpriority_realtime(pid_t thread, int rt_priority)
 /* this is a public symbol, so it has to exist even if threads are disabled. */
 int SDL_LinuxSetThreadPriority(Sint64 threadID, int priority)
 {
-#if SDL_THREADS_DISABLED
+#ifdef SDL_THREADS_DISABLED
     return SDL_Unsupported();
 #else
     if (setpriority(PRIO_PROCESS, (id_t)threadID, priority) == 0) {
@@ -283,7 +283,7 @@ int SDL_LinuxSetThreadPriority(Sint64 threadID, int priority)
 /* this is a public symbol, so it has to exist even if threads are disabled. */
 int SDL_LinuxSetThreadPriorityAndPolicy(Sint64 threadID, int sdlPriority, int schedPolicy)
 {
-#if SDL_THREADS_DISABLED
+#ifdef SDL_THREADS_DISABLED
     return SDL_Unsupported();
 #else
     int osPriority;

src/events/SDL_events.c

@@ -551,7 +551,7 @@ int SDL_StartEventLoop(void)
      */
 
     /* Create the lock and set ourselves active */
-#if !SDL_THREADS_DISABLED
+#ifndef SDL_THREADS_DISABLED
     if (!SDL_EventQ.lock) {
         SDL_EventQ.lock = SDL_CreateMutex();
         if (SDL_EventQ.lock == NULL) {

src/thread/SDL_thread.c

@@ -120,7 +120,7 @@ SDL_Generic_GetTLSData(void)
     SDL_TLSEntry *entry;
     SDL_TLSData *storage = NULL;
 
-#if !SDL_THREADS_DISABLED
+#ifndef SDL_THREADS_DISABLED
     if (SDL_generic_TLS_mutex == NULL) {
         static SDL_SpinLock tls_lock;
         SDL_AtomicLock(&tls_lock);
@@ -145,7 +145,7 @@ SDL_Generic_GetTLSData(void)
             break;
         }
     }
-#if !SDL_THREADS_DISABLED
+#ifndef SDL_THREADS_DISABLED
     SDL_UnlockMutex(SDL_generic_TLS_mutex);
 #endif
 
@@ -203,7 +203,7 @@ static SDL_error *SDL_GetStaticErrBuf(void)
     return &SDL_global_error;
 }
 
-#if !SDL_THREADS_DISABLED
+#ifndef SDL_THREADS_DISABLED
 static void SDLCALL SDL_FreeErrBuf(void *data)
 {
     SDL_error *errbuf = (SDL_error *)data;
@@ -219,7 +219,7 @@ static void SDLCALL SDL_FreeErrBuf(void *data)
 SDL_error *
 SDL_GetErrBuf(void)
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return SDL_GetStaticErrBuf();
 #else
     static SDL_SpinLock tls_lock;

src/thread/SDL_thread_c.h

@@ -24,7 +24,7 @@
 #define SDL_thread_c_h_
 
 /* Need the definitions of SYS_ThreadHandle */
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
 #include "generic/SDL_systhread_c.h"
 #elif SDL_THREAD_PTHREAD
 #include "pthread/SDL_systhread_c.h"

src/thread/generic/SDL_sysmutex.c

@@ -40,7 +40,7 @@ SDL_CreateMutex(void)
     /* Allocate mutex memory */
     mutex = (SDL_mutex *)SDL_calloc(1, sizeof(*mutex));
 
-#if !SDL_THREADS_DISABLED
+#ifndef SDL_THREADS_DISABLED
     if (mutex) {
         /* Create the mutex semaphore, with initial value 1 */
         mutex->sem = SDL_CreateSemaphore(1);
@@ -72,7 +72,7 @@ void SDL_DestroyMutex(SDL_mutex *mutex)
 /* Lock the mutex */
 int SDL_LockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return 0;
 #else
     SDL_threadID this_thread;
@@ -101,7 +101,7 @@ int SDL_LockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn
 /* try Lock the mutex */
 int SDL_TryLockMutex(SDL_mutex *mutex)
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return 0;
 #else
     int retval = 0;
@@ -133,7 +133,7 @@ int SDL_TryLockMutex(SDL_mutex *mutex)
 /* Unlock the mutex */
 int SDL_UnlockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return 0;
 #else
     if (mutex == NULL) {

src/thread/generic/SDL_syssem.c

@@ -24,7 +24,7 @@
 
 #include "SDL_systhread_c.h"
 
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
 
 SDL_sem *
 SDL_CreateSemaphore(Uint32 initial_value)

src/thread/psp/SDL_sysmutex.c

@@ -75,7 +75,7 @@ void SDL_DestroyMutex(SDL_mutex *mutex)
 /* Lock the mutex */
 int SDL_LockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return 0;
 #else
     SceInt32 res = 0;
@@ -96,7 +96,7 @@ int SDL_LockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn
 /* Try to lock the mutex */
 int SDL_TryLockMutex(SDL_mutex *mutex)
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return 0;
 #else
     SceInt32 res = 0;
@@ -125,7 +125,7 @@ int SDL_TryLockMutex(SDL_mutex *mutex)
 /* Unlock the mutex */
 int SDL_UnlockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return 0;
 #else
     SceInt32 res = 0;

src/thread/vita/SDL_sysmutex.c

@@ -71,7 +71,7 @@ void SDL_DestroyMutex(SDL_mutex *mutex)
 /* Lock the mutex */
 int SDL_LockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return 0;
 #else
     SceInt32 res = 0;
@@ -92,7 +92,7 @@ int SDL_LockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn
 /* Try to lock the mutex */
 int SDL_TryLockMutex(SDL_mutex *mutex)
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return 0;
 #else
     SceInt32 res = 0;
@@ -121,7 +121,7 @@ int SDL_TryLockMutex(SDL_mutex *mutex)
 /* Unlock the mutex */
 int SDL_UnlockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
 {
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     return 0;
 #else
     SceInt32 res = 0;

src/timer/SDL_timer.c

@@ -25,7 +25,7 @@
 
 /* #define DEBUG_TIMERS */
 
-#if !defined(__EMSCRIPTEN__) || !SDL_THREADS_DISABLED
+#if !defined(__EMSCRIPTEN__) || !defined(SDL_THREADS_DISABLED)
 
 typedef struct SDL_Timer
 {

src/video/wayland/SDL_waylanddatamanager.c

@@ -54,7 +54,7 @@ static ssize_t write_pipe(int fd, const void *buffer, size_t total_length, size_
     sigemptyset(&sig_set);
     sigaddset(&sig_set, SIGPIPE);
 
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     sigprocmask(SIG_BLOCK, &sig_set, &old_sig_set);
 #else
     pthread_sigmask(SIG_BLOCK, &sig_set, &old_sig_set);
@@ -76,7 +76,7 @@ static ssize_t write_pipe(int fd, const void *buffer, size_t total_length, size_
 
     sigtimedwait(&sig_set, 0, &zerotime);
 
-#if SDL_THREADS_DISABLED
+#if defined(SDL_THREADS_DISABLED)
     sigprocmask(SIG_SETMASK, &old_sig_set, NULL);
 #else
     pthread_sigmask(SIG_SETMASK, &old_sig_set, NULL);