void *Hunk_HighAllocName (int size, char *name) {
hunk_t *h;
if (size < 0)
Sys_Error ("Hunk_HighAllocName: bad size: %i", size);
if (hunk_tempactive) {
Hunk_FreeToHighMark (hunk_tempmark);
hunk_tempactive = false;
}
#ifdef PARANOID
Hunk_Check ();
#endif
size = sizeof(hunk_t) + ((size+15)&~15);
if (hunk_size - hunk_low_used - hunk_high_used < size)
Sys_Error ("Hunk_HighAllocName: Not enough RAM allocated. Try using \"-mem 128\" on the ezQuake command line.");
hunk_high_used += size;
Cache_FreeHigh (hunk_high_used);
h = (hunk_t *) (hunk_base + hunk_size - hunk_high_used);
memset (h, 0, size);
h->size = size;
h->sentinal = HUNK_SENTINEL;
strlcpy (h->name, name, sizeof (h->name));
return (void *) (h + 1);
}
int Hunk_HighMark (void) {
if (hunk_tempactive) {
hunk_tempactive = false;
Hunk_FreeToHighMark (hunk_tempmark);
}
return hunk_high_used;
}
void Hunk_FreeToHighMark (int mark) {
if (hunk_tempactive) {
hunk_tempactive = false;
Hunk_FreeToHighMark (hunk_tempmark);
}
if (mark < 0 || mark > hunk_high_used)
Sys_Error ("Hunk_FreeToHighMark: bad mark %i", mark);
memset (hunk_base + hunk_size - hunk_high_used, 0, hunk_high_used - mark);
hunk_high_used = mark;
}
//Return space from the top of the hunk
void *Hunk_TempAlloc (int size) {
void *buf;
size = (size + 15) & ~15;
if (hunk_tempactive) {
Hunk_FreeToHighMark (hunk_tempmark);
hunk_tempactive = false;
}
hunk_tempmark = Hunk_HighMark ();
buf = Hunk_HighAllocName (size, "temp");
hunk_tempactive = true;
return buf;
}
void Hunk_FreeToHighMark (int mark)
{
if (hunk_tempactive)
{
hunk_tempactive = false;
Hunk_FreeToHighMark (hunk_tempmark);
}
if (mark < 0 || mark > hunk_high_used)
Sys_Error ("Hunk_FreeToHighMark: bad mark %i", mark);
#if 0
memset (hunk_base + hunk_size - hunk_high_used, 0, hunk_high_used - mark);
#else
// Fill the memory with junk (debug only) or don't bother in non-debug
#if _DEBUG
memset (hunk_base + hunk_size - hunk_high_used, 0xDD, hunk_high_used - mark);
#endif
#endif
hunk_high_used = mark;
}
/*
================
VID_AllocBuffers
================
*/
static qboolean VID_AllocBuffers (int width, int height)
{
int tsize, tbuffersize;
tbuffersize = width * height * sizeof (*d_pzbuffer);
tsize = D_SurfaceCacheForRes (width, height);
tbuffersize += tsize;
// see if there's enough memory, allowing for the normal mode 0x13 pixel,
// z, and surface buffers
//if ((host_parms->memsize - tbuffersize + SURFCACHE_SIZE_AT_320X200 +
// 0x10000 * 3) < MINIMUM_MEMORY)
// Pa3PyX: using hopefully better estimation now
// if total memory < needed surface cache + (minimum operational memory
// less surface cache for 320x200 and typical hunk state after init)
if (host_parms->memsize < tbuffersize + 0x180000 + 0xC00000)
{
Con_SafePrintf ("Not enough memory for video mode\n");
return false; // not enough memory for mode
}
vid_surfcachesize = tsize;
if (d_pzbuffer)
{
D_FlushCaches ();
Hunk_FreeToHighMark (VID_highhunkmark);
d_pzbuffer = NULL;
}
VID_highhunkmark = Hunk_HighMark ();
d_pzbuffer = (short *) Hunk_HighAllocName (tbuffersize, "video");
vid_surfcache = (byte *)d_pzbuffer +
width * height * sizeof (*d_pzbuffer);
return true;
}
/*
===================
Hunk_HighAllocName
===================
*/
void *Hunk_HighAllocName (int size, const char *name)
{
hunk_t *h;
if (size < 0)
Sys_Error ("Hunk_HighAllocName: bad size: %i", size);
if (hunk_tempactive)
{
Hunk_FreeToHighMark (hunk_tempmark);
hunk_tempactive = false;
}
#ifdef PARANOID
Hunk_Check ();
#endif
size = sizeof(hunk_t) + ((size+15)&~15);
if (hunk_size - hunk_low_used - hunk_high_used < size)
{
Con_Printf ("Hunk_HighAlloc: failed on %i bytes\n",size);
return NULL;
}
hunk_high_used += size;
Cache_FreeHigh (hunk_high_used);
h = (hunk_t *)(hunk_base + hunk_size - hunk_high_used);
memset (h, 0, size);
h->size = size;
h->sentinal = HUNK_SENTINAL;
strncpy (h->name, name, 8);
return (void *)(h+1);
}