Chrome's Native Client backend implementation

include/SDL_assert.h

@@ -51,7 +51,7 @@ assert can have unique static variables associated with it.
 /* Don't include intrin.h here because it contains C++ code */
     extern void __cdecl __debugbreak(void);
     #define SDL_TriggerBreakpoint() __debugbreak()
-#elif (defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)))
+#elif (!defined(__NACL__) && defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)))
     #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "int $3\n\t" )
 #elif defined(HAVE_SIGNAL_H)
     #include <signal.h>

include/SDL_config.h.in

@@ -208,6 +208,7 @@
 #undef SDL_AUDIO_DRIVER_DSOUND
 #undef SDL_AUDIO_DRIVER_ESD
 #undef SDL_AUDIO_DRIVER_ESD_DYNAMIC
+#undef SDL_AUDIO_DRIVER_NACL
 #undef SDL_AUDIO_DRIVER_NAS
 #undef SDL_AUDIO_DRIVER_NAS_DYNAMIC
 #undef SDL_AUDIO_DRIVER_SNDIO
@@ -297,6 +298,7 @@
 #undef SDL_VIDEO_DRIVER_X11_CONST_PARAM_XDATA32
 #undef SDL_VIDEO_DRIVER_X11_CONST_PARAM_XEXTADDDISPLAY
 #undef SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
+#undef SDL_VIDEO_DRIVER_NACL
 
 #undef SDL_VIDEO_RENDER_D3D
 #undef SDL_VIDEO_RENDER_D3D11

include/SDL_main.h

@@ -67,6 +67,15 @@
  */
 #define SDL_MAIN_NEEDED
 
+#elif defined(__NACL__)
+/* On NACL we use ppapi_simple to set up the application helper code,
+   then wait for the first PSE_INSTANCE_DIDCHANGEVIEW event before 
+   starting the user main function.
+   All user code is run in a separate thread by ppapi_simple, thus 
+   allowing for blocking io to take place via nacl_io
+*/
+#define SDL_MAIN_NEEDED
+
 #endif
 #endif /* SDL_MAIN_HANDLED */
 

include/SDL_platform.h

@@ -56,7 +56,7 @@
 #undef __IRIX__
 #define __IRIX__    1
 #endif
-#if defined(linux) || defined(__linux) || defined(__linux__)
+#if (defined(linux) || defined(__linux) || defined(__linux__))
 #undef __LINUX__
 #define __LINUX__   1
 #endif
@@ -142,6 +142,23 @@
 #define __PSP__ 1
 #endif
 
+/* The NACL compiler defines __native_client__ and __pnacl__
+ * Ref: http://www.chromium.org/nativeclient/pnacl/stability-of-the-pnacl-bitcode-abi
+ */
+#if defined(__native_client__)
+#undef __LINUX__
+#undef __NACL__
+#define __NACL__ 1
+#endif
+#if defined(__pnacl__)
+#undef __LINUX__
+#undef __PNACL__
+#define __PNACL__ 1
+/* PNACL with newlib supports static linking only */
+#define __SDL_NOGETPROCADDR__
+#endif
+
+
 #include "begin_code.h"
 /* Set up for C function definitions, even when using C++ */
 #ifdef __cplusplus

include/SDL_rwops.h

@@ -220,6 +220,16 @@ extern DECLSPEC size_t SDLCALL SDL_WriteLE64(SDL_RWops * dst, Uint64 value);
 extern DECLSPEC size_t SDLCALL SDL_WriteBE64(SDL_RWops * dst, Uint64 value);
 /* @} *//* Write endian functions */
 
+/**
+ *  \name Mount/umount functions
+ *
+ *  Required for RWOps on Native Client
+ */
+/* @{ */
+extern DECLSPEC int SDLCALL SDL_RWMount(const char* source, const char* target, 
+                                        const char* filesystemtype, 
+                                        unsigned long mountflags, const void *data);
+extern DECLSPEC int SDLCALL SDL_RWUmount(const char *target);
 
 /* Ends C function definitions when using C++ */
 #ifdef __cplusplus