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/* XALLOC -- X's internal memory allocator. Why does it return unsigned
* long * instead of the more common char *? Well, if you read K&R you'll
* see they say that alloc must return a pointer "suitable for conversion"
* to whatever type you really want. In a full-blown generic allocator
* there's no way to solve the alignment problems without potentially
* wasting lots of space. But we have a more limited problem. We know
* we're only ever returning pointers to structures which will have to
* be long word aligned. So we are making a stronger guarantee. It might
* have made sense to make Xalloc return char * to conform with people's
* expectations of malloc, but this makes lint happier.
*/
#ifdef WIN32
#include <X11/Xwinsock.h>
#endif
#include "X11/Xos.h"
#include <stdio.h>
#include "Xserver/misc.h"
#include "X11/X.h"
#include "Xserver/input.h"
#include "Xserver/opaque.h"
#ifdef X_POSIX_C_SOURCE
#define _POSIX_C_SOURCE X_POSIX_C_SOURCE
#include <signal.h>
#undef _POSIX_C_SOURCE
#else
#if defined(X_NOT_POSIX) || defined(_POSIX_SOURCE)
#include <signal.h>
#else
#define _POSIX_SOURCE
#include <signal.h>
#undef _POSIX_SOURCE
#endif
#endif
#if !defined(SYSV) && !defined(AMOEBA) && !defined(_MINIX) && !defined(WIN32) && !defined(Lynx)
#include <sys/resource.h>
#endif
#include <time.h>
#include <sys/stat.h>
#include <ctype.h> /* for isspace */
#if NeedVarargsPrototypes
#include <stdarg.h>
#endif
#ifdef __sgi__
#undef abs
#endif
#include <stdlib.h>
#ifndef INTERNAL_MALLOC
Bool Must_have_memory = FALSE;
unsigned long *
Xalloc (amount)
unsigned long amount;
{
#if !defined(__STDC__) && !defined(AMOEBA)
char *malloc();
#endif
register pointer ptr;
if ((long)amount <= 0) {
return (unsigned long *)NULL;
}
/* aligned extra on long word boundary */
amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
#ifdef MEMBUG
if (!Must_have_memory && Memory_fail &&
((random() % MEM_FAIL_SCALE) < Memory_fail))
return (unsigned long *)NULL;
#endif
if ((ptr = (pointer)malloc(amount))) {
return (unsigned long *)ptr;
}
if (Must_have_memory)
FatalError("Out of memory");
return (unsigned long *)NULL;
}
/*****************
* XNFalloc
* "no failure" realloc, alternate interface to Xalloc w/o Must_have_memory
*****************/
unsigned long *
XNFalloc (amount)
unsigned long amount;
{
#if !defined(__STDC__) && !defined(AMOEBA)
char *malloc();
#endif
register pointer ptr;
if ((long)amount <= 0)
{
return (unsigned long *)NULL;
}
/* aligned extra on long word boundary */
amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
ptr = (pointer)malloc(amount);
if (!ptr)
{
FatalError("Out of memory");
}
return ((unsigned long *)ptr);
}
/*****************
* Xcalloc
*****************/
unsigned long *
Xcalloc (amount)
unsigned long amount;
{
unsigned long *ret;
ret = Xalloc (amount);
if (ret)
bzero ((char *) ret, (int) amount);
return ret;
}
/*****************
* Xrealloc
*****************/
unsigned long *
Xrealloc (ptr, amount)
register pointer ptr;
unsigned long amount;
{
#if !defined(__STDC__) && !defined(AMOEBA)
char *malloc();
char *realloc();
#endif
#ifdef MEMBUG
if (!Must_have_memory && Memory_fail &&
((random() % MEM_FAIL_SCALE) < Memory_fail))
return (unsigned long *)NULL;
#endif
if ((long)amount <= 0)
{
if (ptr && !amount)
free(ptr);
return (unsigned long *)NULL;
}
amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
if (ptr)
ptr = (pointer)realloc((char *)ptr, amount);
else
ptr = (pointer)malloc(amount);
if (ptr)
return (unsigned long *)ptr;
if (Must_have_memory)
FatalError("Out of memory");
return (unsigned long *)NULL;
}
/*****************
* XNFrealloc
* "no failure" realloc, alternate interface to Xrealloc w/o Must_have_memory
*****************/
unsigned long *
XNFrealloc (ptr, amount)
register pointer ptr;
unsigned long amount;
{
if (( ptr = (pointer)Xrealloc( ptr, amount ) ) == NULL)
{
FatalError( "Out of memory" );
}
return ((unsigned long *)ptr);
}
/*****************
* Xfree
* calls free
*****************/
void
Xfree(ptr)
register pointer ptr;
{
if (ptr)
free((char *)ptr);
}
void
FatalError(char *f, ...)
{
va_list args;
fprintf(stderr, "\nFatal server error:\n");
va_start(args, f);
vfprintf(stderr, f, args);
va_end(args);
fprintf(stderr, "\n");
exit(1);
}
#endif
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