/* do not edit automatically generated by mc from SysStorage.  */
/* SysStorage.mod provides dynamic allocation for the system components.

Copyright (C) 2001-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.

This file is part of GNU Modula-2.

GNU Modula-2 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 Software Foundation; either version 3, or (at your option)
any later version.

GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

#include "config.h"
#include "system.h"
#include <stdbool.h>
#   if !defined (PROC_D)
#      define PROC_D
       typedef void (*PROC_t) (void);
       typedef struct { PROC_t proc; } PROC;
#   endif

#   if !defined (TRUE)
#      define TRUE (1==1)
#   endif

#   if !defined (FALSE)
#      define FALSE (1==0)
#   endif

#if defined(__cplusplus)
#   undef NULL
#   define NULL 0
#endif
#define _SysStorage_H
#define _SysStorage_C

#   include "Glibc.h"
#   include "GDebug.h"
#   include "GSYSTEM.h"

#   define enableDeallocation true
#   define enableZero true
#   define enableTrace false
static unsigned int callno;
static bool zero;
static bool trace;
extern "C" void SysStorage_ALLOCATE (void * *a, unsigned int size);
extern "C" void SysStorage_DEALLOCATE (void * *a, unsigned int size);

/*
   REALLOCATE - attempts to reallocate storage. The address,
                a, should either be NIL in which case ALLOCATE
                is called, or alternatively it should have already
                been initialized by ALLOCATE. The allocated storage
                is resized accordingly.
*/

extern "C" void SysStorage_REALLOCATE (void * *a, unsigned int size);

/*
   REALLOCATE - attempts to reallocate storage. The address,
                a, should either be NIL in which case ALLOCATE
                is called, or alternatively it should have already
                been initialized by ALLOCATE. The allocated storage
                is resized accordingly.
*/

extern "C" bool SysStorage_Available (unsigned int size);

/*
   Init - initializes the heap.  This does nothing on a GNU/Linux system.
          But it remains here since it might be used in an embedded system.
*/

extern "C" void SysStorage_Init (void);

extern "C" void SysStorage_ALLOCATE (void * *a, unsigned int size)
{
  (*a) = libc_malloc (static_cast<size_t> (size));
  if ((*a) == NULL)
    {
      Debug_Halt ((const char *) "out of memory error", 19, (const char *) "../../gcc-read-write/gcc/m2/gm2-libs/SysStorage.mod", 51, (const char *) "ALLOCATE", 8, 51);
    }
  if (enableTrace && trace)
    {
      libc_printf ((const char *) "<DEBUG-CALL> %d SysStorage.ALLOCATE (0x%x, %d bytes)\\n", 54, callno, (*a), size);
      libc_printf ((const char *) "<MEM-ALLOC> %ld %d\\n", 20, (*a), size);
      callno += 1;
    }
}

extern "C" void SysStorage_DEALLOCATE (void * *a, unsigned int size)
{
  if (enableTrace && trace)
    {
      libc_printf ((const char *) "<DEBUG-CALL> %d SysStorage.DEALLOCATE (0x%x, %d bytes)\\n", 56, callno, (*a), size);
      callno += 1;
    }
  if (enableZero && zero)
    {
      if (enableTrace && trace)
        {
          libc_printf ((const char *) "  memset (0x%x, 0, %d bytes)\\n", 30, (*a), size);
        }
      if ((libc_memset ((*a), 0, static_cast<size_t> (size))) != (*a))
        {
          Debug_Halt ((const char *) "memset should have returned the first parameter", 47, (const char *) "../../gcc-read-write/gcc/m2/gm2-libs/SysStorage.mod", 51, (const char *) "DEALLOCATE", 10, 78);
        }
    }
  if (enableDeallocation)
    {
      if (enableTrace && trace)
        {
          libc_printf ((const char *) "  free (0x%x)   %d bytes\\n", 26, (*a), size);
          libc_printf ((const char *) "<MEM-FREE> %ld %d\\n", 19, (*a), size);
        }
      libc_free ((*a));
    }
  (*a) = NULL;
}


/*
   REALLOCATE - attempts to reallocate storage. The address,
                a, should either be NIL in which case ALLOCATE
                is called, or alternatively it should have already
                been initialized by ALLOCATE. The allocated storage
                is resized accordingly.
*/

extern "C" void SysStorage_REALLOCATE (void * *a, unsigned int size)
{
  if ((*a) == NULL)
    {
      SysStorage_ALLOCATE (a, size);
    }
  else
    {
      if (enableTrace && trace)
        {
          libc_printf ((const char *) "<DEBUG-CALL> %d SysStorage.REALLOCATE (0x%x, %d bytes)\\n", 56, callno, (*a), size);
          callno += 1;
        }
      if (enableTrace && trace)
        {
          libc_printf ((const char *) "  realloc (0x%x, %d bytes)  ->  ", 32, (*a), size);
          libc_printf ((const char *) "<MEM-FREE> %ld %d\\n", 19, (*a), size);
        }
      (*a) = libc_realloc ((*a), static_cast<size_t> (size));
      if ((*a) == NULL)
        {
          Debug_Halt ((const char *) "out of memory error", 19, (const char *) "../../gcc-read-write/gcc/m2/gm2-libs/SysStorage.mod", 51, (const char *) "REALLOCATE", 10, 122);
        }
      if (enableTrace && trace)
        {
          libc_printf ((const char *) "<MEM-ALLOC> %ld %d\\n", 20, (*a), size);
          libc_printf ((const char *) "  0x%x  %d bytes\\n", 18, (*a), size);
        }
    }
}


/*
   REALLOCATE - attempts to reallocate storage. The address,
                a, should either be NIL in which case ALLOCATE
                is called, or alternatively it should have already
                been initialized by ALLOCATE. The allocated storage
                is resized accordingly.
*/

extern "C" bool SysStorage_Available (unsigned int size)
{
  void * a;

  if (enableTrace && trace)
    {
      libc_printf ((const char *) "<DEBUG-CALL> %d SysStorage.Available (%d bytes)\\n", 49, callno, size);
      callno += 1;
    }
  a = libc_malloc (static_cast<size_t> (size));
  if (a == NULL)
    {
      if (enableTrace && trace)
        {
          libc_printf ((const char *) "   no\\n", 7, size);
        }
      return false;
    }
  else
    {
      if (enableTrace && trace)
        {
          libc_printf ((const char *) "   yes\\n", 8, size);
        }
      libc_free (a);
      return true;
    }
  /* static analysis guarentees a RETURN statement will be used before here.  */
  __builtin_unreachable ();
}


/*
   Init - initializes the heap.  This does nothing on a GNU/Linux system.
          But it remains here since it might be used in an embedded system.
*/

extern "C" void SysStorage_Init (void)
{
}

extern "C" void _M2_SysStorage_init (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[])
{
  callno = 0;
  if (enableTrace)
    {
      trace = (libc_getenv (const_cast<void*> (reinterpret_cast<const void*>("M2DEBUG_SYSSTORAGE_trace")))) != NULL;
    }
  else
    {
      trace = false;
    }
  if (enableZero)
    {
      zero = (libc_getenv (const_cast<void*> (reinterpret_cast<const void*>("M2DEBUG_SYSSTORAGE_zero")))) != NULL;
    }
  else
    {
      zero = false;
    }
}

extern "C" void _M2_SysStorage_fini (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[])
{
}