code review 6501077: runtime: refactor goroutine blocking

src/pkg/runtime/runtime.h

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 /*
  * basic types
  */
 typedef signed char             int8;
 typedef unsigned char           uint8;
 typedef signed short            int16;
@@ skipping 99 matching lines @@
         Grunning,
         Gsyscall,
         Gwaiting,
         Gmoribund,
         Gdead,
 };
 enum
 {
         true    = 1,
         false   = 0,
+};
+enum
+{
+        PtrSize = sizeof(void*),
 };
 
 /*
  * structures
  */
 union   Lock
 {
         uint32  key;    // futex-based impl
         M*      waitm;  // linked list of waiting M's (sema-based impl)
 };
@@ skipping 689 matching lines @@
 void    runtime·setprof(bool);
 
 // float.c
 extern float64 runtime·nan;
 extern float64 runtime·posinf;
 extern float64 runtime·neginf;
 extern uint64 ·nan;
 extern uint64 ·posinf;
 extern uint64 ·neginf;
 #define ISNAN(f) ((f) != (f))