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vnc: palette: use a pool to reduce memory allocations 

We now that the palette will never have more than 256
elements. Let's use a pool to reduce malloc calls.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Corentin Chary 2011-02-04 09:05:58 +01:00 committed by Anthony Liguori
parent ce702e93b0
commit e31e3694af
2 changed files with 4 additions and 17 deletions
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18
ui/vnc-palette.c
View File

@ -63,23 +63,9 @@ VncPalette *palette_new(size_t max, int bpp)
void palette_destroy(VncPalette *palette) void palette_destroy(VncPalette *palette)
{ {
int i;
if (palette == NULL) { if (palette == NULL) {
return ; qemu_free(palette);
} }
for (i = 0; i < VNC_PALETTE_HASH_SIZE; i++) {
VncPaletteEntry *entry = QLIST_FIRST(&palette->table[i]);
while (entry) {
VncPaletteEntry *tmp = QLIST_NEXT(entry, next);
QLIST_REMOVE(entry, next);
qemu_free(entry);
entry = tmp;
}
}
qemu_free(palette);
} }
int palette_put(VncPalette *palette, uint32_t color) int palette_put(VncPalette *palette, uint32_t color)
@ -97,7 +83,7 @@ int palette_put(VncPalette *palette, uint32_t color)
if (!entry) { if (!entry) {
VncPaletteEntry *entry; VncPaletteEntry *entry;
entry = qemu_mallocz(sizeof(*entry)); entry = &palette->pool[palette->size];
entry->color = color; entry->color = color;
entry->idx = idx; entry->idx = idx;
QLIST_INSERT_HEAD(&palette->table[hash], entry, next); QLIST_INSERT_HEAD(&palette->table[hash], entry, next);

3
ui/vnc-palette.h
View File

@ -34,6 +34,7 @@
#include <stdint.h> #include <stdint.h>
#define VNC_PALETTE_HASH_SIZE 256 #define VNC_PALETTE_HASH_SIZE 256
#define VNC_PALETTE_MAX_SIZE 256
typedef struct VncPaletteEntry { typedef struct VncPaletteEntry {
int idx; int idx;
@ -42,7 +43,7 @@ typedef struct VncPaletteEntry {
} VncPaletteEntry; } VncPaletteEntry;
typedef struct VncPalette { typedef struct VncPalette {
QObject_HEAD; VncPaletteEntry pool[VNC_PALETTE_MAX_SIZE];
size_t size; size_t size;
size_t max; size_t max;
int bpp; int bpp;