From 5d804a39d929ead6b73032d705511e6449070e62 Mon Sep 17 00:00:00 2001
From: TheMode <[EMAIL REDACTED]>
Date: Sat, 8 Mar 2025 18:51:37 +0100
Subject: [PATCH] Implement SDL_GetSystemRAM and SDL_GetNumLogicalCPUCores for
the 3ds (#12494)
---
src/cpuinfo/SDL_cpuinfo.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/src/cpuinfo/SDL_cpuinfo.c b/src/cpuinfo/SDL_cpuinfo.c
index bf425a38c7629..81d1e914ce8cf 100644
--- a/src/cpuinfo/SDL_cpuinfo.c
+++ b/src/cpuinfo/SDL_cpuinfo.c
@@ -85,7 +85,9 @@
#include <kernel.h>
#include <swis.h>
#endif
-
+#ifdef SDL_PLATFORM_3DS
+#include <3ds.h>
+#endif
#ifdef SDL_PLATFORM_PS2
#include <kernel.h>
#endif
@@ -642,6 +644,15 @@ int SDL_GetNumLogicalCPUCores(void)
GetSystemInfo(&info);
SDL_NumLogicalCPUCores = info.dwNumberOfProcessors;
}
+#endif
+#ifdef SDL_PLATFORM_3DS
+ if (SDL_NumLogicalCPUCores <= 0) {
+ bool isNew3DS = false;
+ APT_CheckNew3DS(&isNew3DS);
+ // 1 core is always dedicated to the OS
+ // Meaning that the New3DS has 3 available core, and the Old3DS only one.
+ SDL_NumLogicalCPUCores = isNew3DS ? 4 : 2;
+ }
#endif
// There has to be at least 1, right? :)
if (SDL_NumLogicalCPUCores <= 0) {
@@ -1156,6 +1167,12 @@ int SDL_GetSystemRAM(void)
}
}
#endif
+#ifdef SDL_PLATFORM_3DS
+ if (SDL_SystemRAM <= 0) {
+ // The New3DS has 255MiB, the Old3DS 127MiB
+ SDL_SystemRAM = (int)(osGetMemRegionSize(MEMREGION_ALL) / (1024 * 1024));
+ }
+#endif
#ifdef SDL_PLATFORM_VITA
if (SDL_SystemRAM <= 0) {
/* Vita has 512MiB on SoC, that's split into 256MiB(+109MiB in extended memory mode) for app