build system revision

[vg.git] / vg_mem_queue.h

diff --git a/vg_mem_queue.h b/vg_mem_queue.h
index 1b556ae9affdfe5c5a1d7919a7579bfbc07894c7..f898ada2b7fb0da1139ac4cbe69d65b79c80cee7 100644 (file)
--- a/vg_mem_queue.h
+++ b/vg_mem_queue.h
@@ -1,91 +1,21 @@
-#ifndef VG_MEM_QUEUE_H
-#define VG_MEM_QUEUE_H
-
-#include "vg_mem.h"
-#include "vg_stdint.h"
+#pragma once
 
 typedef struct vg_queue vg_queue;
 typedef struct vg_queue_frame vg_queue_frame;
 
-struct vg_queue_frame {
+struct vg_queue_frame 
+{
    u32 alloc_size,size;
    u8 data[];
 };
 
-struct vg_queue {
+struct vg_queue 
+{
    u8 *buffer;
    u32 size;
    
    vg_queue_frame *head, *tail;
 };
 
-/*
- * Allocate memory on the queue. Returns NULL if allocation failed for any
- * any reason.
- */
-static vg_queue_frame *vg_queue_alloc( vg_queue *q, u32 size ){
-   u32 total = vg_align8(size) + sizeof(vg_queue_frame);
-   vg_queue_frame *frame = NULL;
-
-   if( total > q->size )
-      return NULL;
-
-   if( q->head ){
-      u32 end   = ((u8 *)q->head - q->buffer) + q->head->alloc_size,
-          start = ((u8 *)q->tail - q->buffer),
-          r0    = 0,
-          r1    = 0;
-
-      if( start < end ){
-         r0 = q->size-end;
-         r1 = start;
-      }
-      else 
-         r0 = start - end;
-
-      if( total < r0 ){
-         frame = (vg_queue_frame *)(q->buffer + end);
-      }
-      else {
-         if( total < r1 ){
-            q->head->alloc_size += r0;
-            frame = (vg_queue_frame *)q->buffer;
-         }
-      }
-
-      if( !frame ) return NULL;
-   }
-   else{
-      frame = (vg_queue_frame *)q->buffer;
-      q->tail = frame;
-   }
-
-   memset( frame, 0, sizeof(vg_queue_frame) );
-
-   q->head = frame;
-   frame->alloc_size = total;
-   frame->size = size;
-
-   return frame;
-}
-
-/*
- * Free last item from queue 
- */
-static void vg_queue_pop( vg_queue *q ){
-   if( q->head == q->tail ){
-      q->head = NULL;
-      q->tail = NULL;
-      return;
-   }
-
-   u32 start = ((u8 *)q->tail - q->buffer);
-   start += q->tail->alloc_size;
-
-   if( start == q->size )
-      start = 0;
-
-   q->tail = (vg_queue_frame *)(q->buffer + start);
-}
-
-#endif /* VG_MEM_QUEUE_H */
+vg_queue_frame *vg_queue_alloc( vg_queue *q, u32 size );
+void vg_queue_pop( vg_queue *q );