Shared dri driver resources

1 files changed, 197 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/common/mm.c b/src/mesa/drivers/dri/common/mm.c
new file mode 100644
index 00000000000..b3be95471d5
--- /dev/null
+++ b/src/mesa/drivers/dri/common/mm.c
@@ -0,0 +1,197 @@
+/*
+ * GLX Hardware Device Driver common code
+ * Copyright (C) 1999 Wittawat Yamwong
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * WITTAWAT YAMWONG, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, 
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+/* $XFree86: xc/lib/GL/mesa/src/drv/common/mm.c,v 1.4 2002/10/30 12:51:27 alanh Exp $ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "mm.h"
+#include "hwlog.h"
+
+
+void mmDumpMemInfo( memHeap_t *heap )
+{
+   TMemBlock *p;
+
+   fprintf(stderr, "Memory heap %p:\n", heap);
+   if (heap == 0) {
+      fprintf(stderr, "  heap == 0\n");
+   } else {
+      p = (TMemBlock *)heap;
+      while (p) {
+	 fprintf(stderr, "  Offset:%08x, Size:%08x, %c%c\n",p->ofs,p->size,
+		 p->free ? '.':'U',
+		 p->reserved ? 'R':'.');
+	 p = p->next;
+      }
+   }
+   fprintf(stderr, "End of memory blocks\n");
+}
+
+memHeap_t *mmInit(int ofs,
+		  int size)
+{
+   PMemBlock blocks;
+  
+   if (size <= 0) {
+      return 0;
+   }
+   blocks = (TMemBlock *) calloc(1,sizeof(TMemBlock));
+   if (blocks) {
+      blocks->ofs = ofs;
+      blocks->size = size;
+      blocks->free = 1;
+      return (memHeap_t *)blocks;
+   } else
+      return 0;
+}
+
+
+static TMemBlock* SliceBlock(TMemBlock *p, 
+			     int startofs, int size, 
+			     int reserved, int alignment)
+{
+   TMemBlock *newblock;
+
+   /* break left */
+   if (startofs > p->ofs) {
+      newblock = (TMemBlock*) calloc(1,sizeof(TMemBlock));
+      if (!newblock)
+	 return NULL;
+      newblock->ofs = startofs;
+      newblock->size = p->size - (startofs - p->ofs);
+      newblock->free = 1;
+      newblock->next = p->next;
+      p->size -= newblock->size;
+      p->next = newblock;
+      p = newblock;
+   }
+
+   /* break right */
+   if (size < p->size) {
+      newblock = (TMemBlock*) calloc(1,sizeof(TMemBlock));
+      if (!newblock)
+	 return NULL;
+      newblock->ofs = startofs + size;
+      newblock->size = p->size - size;
+      newblock->free = 1;
+      newblock->next = p->next;
+      p->size = size;
+      p->next = newblock;
+   }
+
+   /* p = middle block */
+   p->align = alignment;
+   p->free = 0;
+   p->reserved = reserved;
+   return p;
+}
+
+PMemBlock mmAllocMem( memHeap_t *heap, int size, int align2, int startSearch)
+{
+   int mask,startofs,endofs;
+   TMemBlock *p;
+
+   if (!heap || align2 < 0 || size <= 0)
+      return NULL;
+   mask = (1 << align2)-1;
+   startofs = 0;
+   p = (TMemBlock *)heap;
+   while (p) {
+      if ((p)->free) {
+	 startofs = (p->ofs + mask) & ~mask;
+	 if ( startofs < startSearch ) {
+	    startofs = startSearch;
+	 }
+	 endofs = startofs+size;
+	 if (endofs <= (p->ofs+p->size))
+	    break;
+      }
+      p = p->next;
+   }
+   if (!p)
+      return NULL;
+   p = SliceBlock(p,startofs,size,0,mask+1);
+   p->heap = heap;
+   return p;
+}
+
+static __inline__ int Join2Blocks(TMemBlock *p)
+{
+   if (p->free && p->next && p->next->free) {
+      TMemBlock *q = p->next;
+      p->size += q->size;
+      p->next = q->next;
+      free(q);
+      return 1;
+   }
+   return 0;
+}
+
+int mmFreeMem(PMemBlock b)
+{
+   TMemBlock *p,*prev;
+
+   if (!b)
+      return 0;
+   if (!b->heap) {
+      fprintf(stderr, "no heap\n");
+      return -1;
+   }
+   p = b->heap;
+   prev = NULL;
+   while (p && p != b) {
+      prev = p;
+      p = p->next;
+   }
+   if (!p || p->free || p->reserved) {
+      if (!p)
+	 fprintf(stderr, "block not found in heap\n");
+      else if (p->free)
+	 fprintf(stderr, "block already free\n");
+      else
+	 fprintf(stderr, "block is reserved\n");
+      return -1;
+   }
+   p->free = 1;
+   Join2Blocks(p);
+   if (prev)
+      Join2Blocks(prev);
+   return 0;
+}
+
+
+void mmDestroy(memHeap_t *heap)
+{
+   TMemBlock *p,*q;
+
+   if (!heap)
+      return;
+   p = (TMemBlock *)heap;
+   while (p) {
+      q = p->next;
+      free(p);
+      p = q;
+   }
+}