* sigproc.cc (proc_info): Rename proc_exists which takes a pid to "pid_exists".

* shared.h: Split out "child_info" stuff into a new header file and use where
necessary.  Declare pid_exists.
* child_info.h: New file.

winsup/cygwin/shared.h

@@ -41,57 +41,6 @@ public:
   void process_queue ();
 };
 
-enum
-{
-  PROC_MAGIC = 0xaf08f000,
-  PROC_FORK = PROC_MAGIC + 1,
-  PROC_EXEC = PROC_MAGIC + 2,
-  PROC_SPAWN = PROC_MAGIC + 3,
-  PROC_FORK1 = PROC_MAGIC + 4	// Newer versions provide stack
-				// location information
-};
-
-#define PROC_MAGIC_MASK 0xff00f000
-#define PROC_MAGIC_GENERIC 0xaf00f000
-#define PROC_MAGIC_VER_MASK 0x0ff0000
-
-#define EXEC_MAGIC_SIZE sizeof(child_info)
-class child_info
-{
-public:
-  DWORD zero[1];	// must be zeroed
-  DWORD cb;		// size of this record
-  DWORD type;		// type of record
-  int cygpid;		// cygwin pid of child process
-  HANDLE subproc_ready;	// used for synchronization with parent
-  HANDLE shared_h;
-  HANDLE console_h;
-  HANDLE parent_alive;	// handle of thread used to track children
-  HANDLE myself_pinfo;
-  ~child_info ()
-  {
-    if (myself_pinfo)
-      CloseHandle (myself_pinfo);
-  }
-};
-
-class child_info_fork: public child_info
-{
-public:
-  HANDLE forker_finished;// for synchronization with child
-  DWORD stacksize;	// size of parent stack
-  void *heaptop;
-  void *heapbase;
-  void *heapptr;
-  jmp_buf jmp;		// where child will jump to
-  void *stacktop;	// location of top of parent stack
-  void *stackbottom;	// location of bottom of parent stack
-};
-
-void __stdcall init_child_info (DWORD, child_info *, int, HANDLE);
-
-extern child_info_fork *child_proc_info;
-
 /* non-NULL if this process is a child of a cygwin process */
 extern HANDLE parent_alive;