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authorTaru Karttunen <taruti@taruti.net>2011-03-30 15:46:40 +0300
committerTaru Karttunen <taruti@taruti.net>2011-03-30 15:46:40 +0300
commite5888a1ffdae813d7575f5fb02275c6bb07e5199 (patch)
treed8d51eac403f07814b9e936eed0c9a79195e2450 /sys/src/liboventi/packet.h
Import sources from 2011-03-30 iso image
Diffstat (limited to 'sys/src/liboventi/packet.h')
-rwxr-xr-xsys/src/liboventi/packet.h56
1 files changed, 56 insertions, 0 deletions
diff --git a/sys/src/liboventi/packet.h b/sys/src/liboventi/packet.h
new file mode 100755
index 000000000..55b8eabf6
--- /dev/null
+++ b/sys/src/liboventi/packet.h
@@ -0,0 +1,56 @@
+typedef struct Packet Packet;
+typedef struct Mem Mem;
+typedef struct Frag Frag;
+
+enum {
+ BigMemSize = MaxFragSize,
+ SmallMemSize = BigMemSize/8,
+ NLocalFrag = 2,
+};
+
+/* position to carve out of a Mem */
+enum {
+ PFront,
+ PMiddle,
+ PEnd,
+};
+
+struct Mem
+{
+ Lock lk;
+ int ref;
+ uchar *bp;
+ uchar *ep;
+ uchar *rp;
+ uchar *wp;
+ Mem *next;
+};
+
+enum {
+ FragLocalFree,
+ FragLocalAlloc,
+ FragGlobal,
+};
+
+struct Frag
+{
+ int state;
+ Mem *mem;
+ uchar *rp;
+ uchar *wp;
+ Frag *next;
+};
+
+struct Packet
+{
+ int size;
+ int asize; /* allocated memmory - always greater than size */
+
+ Packet *next;
+
+ Frag *first;
+ Frag *last;
+
+ Frag local[NLocalFrag];
+};
+