diff options
Diffstat (limited to 'src/lib/shm_rdrbuff.c')
-rw-r--r-- | src/lib/shm_rdrbuff.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/src/lib/shm_rdrbuff.c b/src/lib/shm_rdrbuff.c index 9dffdf74..ed9c3847 100644 --- a/src/lib/shm_rdrbuff.c +++ b/src/lib/shm_rdrbuff.c @@ -24,6 +24,7 @@ #include <ouroboros/config.h> #include <ouroboros/errno.h> #include <ouroboros/shm_rdrbuff.h> +#include <ouroboros/shm_du_buff.h> #include <ouroboros/time_utils.h> #include <pthread.h> @@ -333,7 +334,6 @@ ssize_t shm_rdrbuff_write(struct shm_rdrbuff * rdrb, ssize_t sz = size + sizeof(*sdb); assert(rdrb); - assert(data); #ifndef SHM_RDRB_MULTI_BLOCK if (sz > SHM_RDRB_BLOCK_SIZE) @@ -392,7 +392,8 @@ ssize_t shm_rdrbuff_write(struct shm_rdrbuff * rdrb, sdb->du_head = headspace; sdb->du_tail = sdb->du_head + len; - memcpy(((uint8_t *) (sdb + 1)) + headspace, data, len); + if (data != NULL) + memcpy(((uint8_t *) (sdb + 1)) + headspace, data, len); return sdb->idx; } @@ -412,7 +413,6 @@ ssize_t shm_rdrbuff_write_b(struct shm_rdrbuff * rdrb, ssize_t sz = size + sizeof(*sdb); assert(rdrb); - assert(data); #ifndef SHM_RDRB_MULTI_BLOCK if (sz > SHM_RDRB_BLOCK_SIZE) @@ -472,7 +472,9 @@ ssize_t shm_rdrbuff_write_b(struct shm_rdrbuff * rdrb, sdb->size = size; sdb->du_head = headspace; sdb->du_tail = sdb->du_head + len; - memcpy(((uint8_t *) (sdb + 1)) + headspace, data, len); + + if (data != NULL) + memcpy(((uint8_t *) (sdb + 1)) + headspace, data, len); return sdb->idx; } @@ -495,7 +497,8 @@ ssize_t shm_rdrbuff_read(uint8_t ** dst, return len; } -struct shm_du_buff * shm_rdrbuff_get(struct shm_rdrbuff * rdrb, size_t idx) +struct shm_du_buff * shm_rdrbuff_get(struct shm_rdrbuff * rdrb, + size_t idx) { struct shm_du_buff * sdb; @@ -507,7 +510,8 @@ struct shm_du_buff * shm_rdrbuff_get(struct shm_rdrbuff * rdrb, size_t idx) return sdb; } -int shm_rdrbuff_remove(struct shm_rdrbuff * rdrb, size_t idx) +int shm_rdrbuff_remove(struct shm_rdrbuff * rdrb, + size_t idx) { assert(rdrb); assert(idx < (SHM_BUFFER_SIZE)); @@ -609,3 +613,12 @@ void shm_du_buff_tail_release(struct shm_du_buff * sdb, sdb->du_tail -= size; } + +void shm_du_buff_truncate(struct shm_du_buff * sdb, + size_t len) +{ + assert(sdb); + assert(len <= sdb->size); + + sdb->du_tail -= sdb->size - len; +} |