bugs fix for ghw writer

1 files changed, 53 insertions, 121 deletions

diff --git a/translate/grt/config/win32.c b/translate/grt/config/win32.c
index 80ea270..583b885 100644
--- a/translate/grt/config/win32.c
+++ b/translate/grt/config/win32.c
@@ -1,5 +1,5 @@
-/*  GRT stack implementation for Win32
-    Copyright (C) 2004, 2005 Felix Bertram.
+/*  GRT stack implementation for Win32 using fibers.
+    Copyright (C) 2005 Tristan Gingold.
 
     GHDL is free software; you can redistribute it and/or modify it under
     the terms of the GNU General Public License as published by the Free
@@ -16,139 +16,74 @@
     Software Foundation, 59 Temple Place - Suite 330, Boston, MA
     02111-1307, USA.
 */
-//-----------------------------------------------------------------------------
-// Project:     GHDL - VHDL Simulator
-// Description: Win32 port of stacks package
-// Note:        Tristan's original i386/Linux used assembly-code 
-//              to manually switch stacks for performance reasons.
-// History:     2004feb09, FB, created.
-//-----------------------------------------------------------------------------
 
 #include <windows.h>
-//#include <pthread.h>
-//#include <stdlib.h>
-//#include <stdio.h>
+#include <stdio.h>
 
+struct stack_type
+{
+  LPVOID fiber; //  Win fiber.
+  void (*func)(void *);  // Function
+  void *arg; //  Function argument.
+};
 
-//#define INFO printf
-#define INFO (void)
-
-// GHDL names an endless loop calling FUNC with ARG a 'stack'
-// at a given time, only one stack may be 'executed'
-typedef struct 
-{	HANDLE              thread;         // stack's thread
-	HANDLE              mutex;          // mutex to suspend/resume thread
-	void                (*Func)(void*); // stack's FUNC
-	void*               Arg;            // ARG passed to FUNC
-} Stack_Type_t, *Stack_Type;
-
-Stack_Type_t      main_stack_context;
-extern Stack_Type grt_stack_main_stack;
+static struct stack_type  main_stack_context;
+extern void grt_set_main_stack (struct stack_type *stack);
 
-//------------------------------------------------------------------------------
 void grt_stack_init(void)
-// Initialize the stacks package.
-// This may adjust stack sizes.
-// Must be called after grt.options.decode.
-// => procedure Stack_Init;
-{	INFO("grt_stack_init\n");
-	INFO("  main_stack_context=0x%08x\n", &main_stack_context);
-
-	// create event. reset event, as we are currently running
-	main_stack_context.mutex = CreateEvent(NULL,  // lpsa
-	                                       FALSE, // fManualReset
-	                                       FALSE, // fInitialState
-	                                       NULL); // lpszEventName
-
-	grt_stack_main_stack= &main_stack_context;
+{
+  main_stack_context.fiber = ConvertThreadToFiber (NULL);
+  if (main_stack_context.fiber == NULL)
+    {
+      fprintf (stderr, "convertThreadToFiber failed (err=%lu)\n",
+	       GetLastError ());
+      abort ();
+    }
+  grt_set_main_stack (&main_stack_context);
 }
 
-//------------------------------------------------------------------------------
-static unsigned long __stdcall grt_stack_loop(void* pv_myStack)
+static VOID __stdcall
+grt_stack_loop (void *v_stack)
 {
-	Stack_Type myStack= (Stack_Type)pv_myStack;
-
-	INFO("grt_stack_loop\n");
-	
-	INFO("  myStack=0x%08x\n", myStack);
-
-	// block until event becomes set again.
-	// this happens when this stack is enabled for the first time
-	WaitForSingleObject(myStack->mutex, INFINITE);
-	
-	// run stack's function in endless loop
-	while(1)
-	{	INFO("  call 0x%08x with 0x%08x\n", myStack->Func, myStack->Arg);
-		myStack->Func(myStack->Arg);
-	}
-	
-	// we never get here...
-	return 0;
+  struct stack_type *stack = (struct stack_type *)v_stack;
+  while (1)
+    {
+      (*stack->func)(stack->arg);
+    }
 }
 
-//------------------------------------------------------------------------------
-Stack_Type grt_stack_create(void* Func, void* Arg) 
-// Create a new stack, which on first execution will call FUNC with
-// an argument ARG.
-// => function Stack_Create (Func : Address; Arg : Address) return Stack_Type;
-{  	Stack_Type newStack;
-	DWORD      m_IDThread; // Thread's ID (dummy)
-
-	INFO("grt_stack_create\n");
-	INFO("  call 0x%08x with 0x%08x\n", Func, Arg);
-			
-	newStack= malloc(sizeof(Stack_Type_t));
-	
-	// init function and argument
-	newStack->Func= Func;
-	newStack->Arg=  Arg;
-	
-	// create event. reset event, so that thread will blocked in grt_stack_loop
-	newStack->mutex= CreateEvent(NULL,  // lpsa
-	                             FALSE, // fManualReset
-	                             FALSE, // fInitialState
-	                             NULL); // lpszEventName
-	
-	INFO("  newStack=0x%08x\n", newStack);
-	
-	// create thread, which executes grt_stack_loop
-	newStack->thread= CreateThread(NULL,           // lpsa
-	                               0,              // cbStack
-	                               grt_stack_loop, // lpStartAddr
-	                               newStack,       // lpvThreadParm
-	                               0,              // fdwCreate
-	                               &m_IDThread);   // lpIDThread
-	
-	return newStack;
+struct stack_type *
+grt_stack_create (void (*func)(void *), void *arg) 
+{
+  struct stack_type *res;
+
+  res = malloc (sizeof (struct stack_type));
+  if (res == NULL)
+    return NULL;
+  res->func = func;
+  res->arg = arg;
+  res->fiber = CreateFiber (0, &grt_stack_loop, res);
+  if (res->fiber == NULL)
+    {
+      free (res);
+      return NULL;
+    }
+  return res;
 }
 
-//------------------------------------------------------------------------------
-void grt_stack_switch(Stack_Type To, Stack_Type From)
-// Resume stack TO and save the current context to the stack pointed by
-// CUR.
-// => procedure Stack_Switch (To : Stack_Type; From : Stack_Type);
-{	INFO("grt_stack_switch\n");
-	INFO("  from 0x%08x to 0x%08x\n", From, To);
-	
-	// set 'To' event. this will make the other thread either
-	// - start for first time in grt_stack_loop
-	// - resume at WaitForSingleObject below
-	SetEvent(To->mutex);
-		
-	// block until 'From' event becomes set again
-	// as we are running, our event is reset and we block here
-	// when stacks are switched, with above SetEvent, we may proceed
-	WaitForSingleObject(From->mutex, INFINITE);
+void
+grt_stack_switch (struct stack_type *to, struct stack_type *from)
+{
+  SwitchToFiber (to->fiber);
 }
 
-//------------------------------------------------------------------------------
-void grt_stack_delete(Stack_Type Stack)
-// Delete stack STACK, which must not be currently executed.
-// => procedure Stack_Delete (Stack : Stack_Type);
-{	INFO("grt_stack_delete\n");
+void
+grt_stack_delete (struct stack_type *stack)
+{
+  DeleteFiber (stack->fiber);
+  stack->fiber = NULL;
 }
 
-//----------------------------------------------------------------------------
 #ifndef WITH_GNAT_RUN_TIME
 void __gnat_raise_storage_error(void)
 {
@@ -161,6 +96,3 @@ void __gnat_raise_program_error(void)
 }
 #endif
 
-//----------------------------------------------------------------------------
-// end of file
-