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authorDimitri Staessens <dimitri.staessens@ugent.be>2017-11-08 19:25:48 +0100
committerSander Vrijders <sander.vrijders@ugent.be>2017-11-08 21:40:28 +0100
commit35c43358a110758090b48dd18628bb285ffddfc6 (patch)
tree9746475ac579e516e86f720a3bcb107bf6e36784 /src/lib/shm_rdrbuff.c
parentc59053040ce927f2926e5a569b19bdd129c354a7 (diff)
downloadouroboros-35c43358a110758090b48dd18628bb285ffddfc6.tar.gz
ouroboros-35c43358a110758090b48dd18628bb285ffddfc6.zip
lib: Use packed struct for FRCT header access
This replaces the variable FRCT header with a packed struct, which significantly simplifies the implementation. The shm_du_buff calls to release the head/tail are updated to return a pointer to the original head or the new tail (in symmetry to the alloc calls, which return a pointer to the new head and old tail), so that it immediately points to the structure that is needed. The frct_pci sources are removed and frct is now fully in the frct.c source file. Signed-off-by: Dimitri Staessens <dimitri.staessens@ugent.be> Signed-off-by: Sander Vrijders <sander.vrijders@ugent.be>
Diffstat (limited to 'src/lib/shm_rdrbuff.c')
-rw-r--r--src/lib/shm_rdrbuff.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/src/lib/shm_rdrbuff.c b/src/lib/shm_rdrbuff.c
index a3333a35..2853d5bb 100644
--- a/src/lib/shm_rdrbuff.c
+++ b/src/lib/shm_rdrbuff.c
@@ -602,8 +602,6 @@ uint8_t * shm_du_buff_tail(struct shm_du_buff * sdb)
uint8_t * shm_du_buff_head_alloc(struct shm_du_buff * sdb,
size_t size)
{
- uint8_t * buf = NULL;
-
assert(sdb);
if (sdb->du_head < size)
@@ -611,15 +609,13 @@ uint8_t * shm_du_buff_head_alloc(struct shm_du_buff * sdb,
sdb->du_head -= size;
- buf = (uint8_t *) (sdb + 1) + sdb->du_head;
-
- return buf;
+ return (uint8_t *) (sdb + 1) + sdb->du_head;
}
uint8_t * shm_du_buff_tail_alloc(struct shm_du_buff * sdb,
size_t size)
{
- uint8_t * buf = NULL;
+ uint8_t * buf;
assert(sdb);
@@ -633,22 +629,30 @@ uint8_t * shm_du_buff_tail_alloc(struct shm_du_buff * sdb,
return buf;
}
-void shm_du_buff_head_release(struct shm_du_buff * sdb,
- size_t size)
+uint8_t * shm_du_buff_head_release(struct shm_du_buff * sdb,
+ size_t size)
{
+ uint8_t * buf;
+
assert(sdb);
assert(!(size > sdb->du_tail - sdb->du_head));
+ buf = (uint8_t *) (sdb + 1) + sdb->du_head;
+
sdb->du_head += size;
+
+ return buf;
}
-void shm_du_buff_tail_release(struct shm_du_buff * sdb,
+uint8_t * shm_du_buff_tail_release(struct shm_du_buff * sdb,
size_t size)
{
assert(sdb);
assert(!(size > sdb->du_tail - sdb->du_head));
sdb->du_tail -= size;
+
+ return (uint8_t *) (sdb + 1) + sdb->du_tail;
}
void shm_du_buff_truncate(struct shm_du_buff * sdb,