Add specific lib code for Nintendo Switch

lib/pure/os.nim

@@ -819,7 +819,8 @@ iterator walkDir*(dir: string; relative=false): tuple[kind: PathComponent, path:
               y = dir / y
             var k = pcFile
 
-            when defined(linux) or defined(macosx) or defined(bsd) or defined(genode):
+            when defined(linux) or defined(macosx) or
+                 defined(bsd) or defined(genode) or defined(nintendoswitch):
               if x.d_type != DT_UNKNOWN:
                 if x.d_type == DT_DIR: k = pcDir
                 if x.d_type == DT_LNK:
@@ -1285,7 +1286,7 @@ elif defined(windows):
 
 elif not defined(createNimRtl) and
   not(defined(posix) and appType == "lib") and
-  not defined(genode):
+  not defined(genode) and not defined(nintendoswitch):
   # On Posix, there is no portable way to get the command line from a DLL.
   var
     cmdCount {.importc: "cmdCount".}: cint
@@ -1439,7 +1440,7 @@ proc getAppFilename*(): string {.rtl, extern: "nos$1", tags: [ReadIOEffect].} =
       result = getApplAux("/proc/self/exe")
     elif defined(solaris):
       result = getApplAux("/proc/" & $getpid() & "/path/a.out")
-    elif defined(genode):
+    elif defined(genode) or defined(nintendoswitch):
       raiseOSError(OSErrorCode(-1), "POSIX command line not supported")
     elif defined(freebsd) or defined(dragonfly):
       result = getApplFreebsd()

lib/pure/selectors.nim

@@ -312,6 +312,8 @@ else:
     include ioselects/ioselectors_poll # need to replace it with event ports
   elif defined(genode):
     include ioselects/ioselectors_select # TODO: use the native VFS layer
+  elif defined(nintendoswitch):
+    include ioselects/ioselectors_select
   else:
     include ioselects/ioselectors_poll
 

lib/system/ansi_c.nim

@@ -45,7 +45,7 @@ when defined(windows):
     SIGTERM = cint(15)
 elif defined(macosx) or defined(linux) or defined(freebsd) or
      defined(openbsd) or defined(netbsd) or defined(solaris) or
-     defined(dragonfly):
+     defined(dragonfly) or defined(nintendoswitch):
   const
     SIGABRT = cint(6)
     SIGFPE = cint(8)

lib/system/dyncalls.nim

@@ -167,6 +167,24 @@ elif defined(genode):
   proc nimGetProcAddr(lib: LibHandle, name: cstring): ProcAddr {.
     error: "nimGetProcAddr not implemented".}
 
+elif defined(nintendoswitch):
+  proc nimUnloadLibrary(lib: LibHandle) =
+    stderr.rawWrite("nimUnLoadLibrary not implemented")
+    stderr.rawWrite("\n")
+    quit(1)
+
+  proc nimLoadLibrary(path: string): LibHandle =
+    stderr.rawWrite("nimLoadLibrary not implemented")
+    stderr.rawWrite("\n")
+    quit(1)
+
+
+  proc nimGetProcAddr(lib: LibHandle, name: cstring): ProcAddr =
+    stderr.rawWrite("nimGetProAddr not implemented")
+    stderr.write(name)
+    stderr.rawWrite("\n")
+    quit(1)
+
 else:
   {.error: "no implementation for dyncalls".}
 

lib/system/platforms.nim

@@ -31,13 +31,14 @@ type
     vm,                        ## Some Virtual machine: Nim's VM or JavaScript
     avr,                       ## AVR based processor
     msp430,                    ## TI MSP430 microcontroller
-    riscv64                    ## RISC-V 64-bit processor
+    riscv64,                   ## RISC-V 64-bit processor
+    armv8a57                   ## Arm Cortex A57 64-bit processor for Nintendo Switch
 
   OsPlatform* {.pure.} = enum ## the OS this program will run on.
     none, dos, windows, os2, linux, morphos, skyos, solaris,
     irix, netbsd, freebsd, openbsd, aix, palmos, qnx, amiga,
     atari, netware, macos, macosx, haiku, android, js, nimVM,
-    standalone
+    standalone, nintendoswitch
 
 const
   targetOS* = when defined(windows): OsPlatform.windows
@@ -64,6 +65,7 @@ const
               elif defined(js): OsPlatform.js
               elif defined(nimVM): OsPlatform.nimVM
               elif defined(standalone): OsPlatform.standalone
+              elif defined(nintendoswitch): OsPlatform.nintendoswitch
               else: OsPlatform.none
     ## the OS this program will run on.
 
@@ -86,5 +88,6 @@ const
                elif defined(avr): CpuPlatform.avr
                elif defined(msp430): CpuPlatform.msp430
                elif defined(riscv64): CpuPlatform.riscv64
+               elif defined(armv8a57): CpuPlatform.armv8a57
                else: CpuPlatform.none
     ## the CPU this program will run on.

lib/system/sysio.nim

@@ -419,7 +419,7 @@ proc setStdIoUnbuffered() =
 when declared(stdout):
   proc echoBinSafe(args: openArray[string]) {.compilerProc.} =
     # flockfile deadlocks some versions of Android 5.x.x
-    when not defined(windows) and not defined(android):
+    when not defined(windows) and not defined(android) and not defined(nintendoswitch):
       proc flockfile(f: File) {.importc, noDecl.}
       proc funlockfile(f: File) {.importc, noDecl.}
       flockfile(stdout)
@@ -428,7 +428,7 @@ when declared(stdout):
     const linefeed = "\n" # can be 1 or more chars
     discard c_fwrite(linefeed.cstring, linefeed.len, 1, stdout)
     discard c_fflush(stdout)
-    when not defined(windows) and not defined(android):
+    when not defined(windows) and not defined(android) and not defined(nintendoswitch):
       funlockfile(stdout)
 
 {.pop.}

lib/system/threads.nim

@@ -185,6 +185,14 @@ else:
         abi: array[56 div sizeof(clong), clong]
       ThreadVarSlot {.importc: "pthread_key_t",
                     header: "<sys/types.h>".} = distinct cuint
+  elif defined(nintendoswitch):
+    type
+      SysThread* {.importc: "pthread_t",
+                  header: "<sys/types.h>" .} = distinct cuint
+      Pthread_attr {.importc: "pthread_attr_t",
+                    header: "<sys/types.h>".} = object
+      ThreadVarSlot {.importc: "pthread_key_t",
+                    header: "<sys/types.h>".} = distinct cuint
   else:
     type
       SysThread* {.importc: "pthread_t", header: "<sys/types.h>".} = object