From 273d9e46400994691e2f1b4d7b11b896d6acdd73 Mon Sep 17 00:00:00 2001
From: Francisco Javier Trujillo Mata <[EMAIL REDACTED]>
Date: Mon, 6 Jun 2022 00:00:45 +0200
Subject: [PATCH] Fix atomic support for PS2
---
src/atomic/SDL_spinlock.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/src/atomic/SDL_spinlock.c b/src/atomic/SDL_spinlock.c
index bdd347e413e..f9877c3fe4e 100644
--- a/src/atomic/SDL_spinlock.c
+++ b/src/atomic/SDL_spinlock.c
@@ -40,6 +40,10 @@
#include <xmmintrin.h>
#endif
+#if defined(PS2)
+#include <kernel.h>
+#endif
+
#if defined(__WATCOMC__) && defined(__386__)
SDL_COMPILE_TIME_ASSERT(locksize, 4==sizeof(SDL_SpinLock));
extern __inline int _SDL_xchg_watcom(volatile int *a, int v);
@@ -131,7 +135,19 @@ SDL_AtomicTryLock(SDL_SpinLock *lock)
#elif defined(__SOLARIS__) && !defined(_LP64)
/* Used for Solaris with non-gcc compilers. */
return (SDL_bool) ((int) atomic_cas_32((volatile uint32_t*)lock, 0, 1) == 0);
+#elif defined(PS2)
+ uint32_t oldintr;
+ SDL_bool res = SDL_FALSE;
+ // disable interuption
+ oldintr = DIntr();
+ if (*lock == 0) {
+ *lock = 1;
+ res = SDL_TRUE;
+ }
+ // enable interuption
+ if(oldintr) { EIntr(); }
+ return res;
#else
#error Please implement for your platform.
return SDL_FALSE;