diff options
Diffstat (limited to 'src/shared/dlt_shm.c')
| -rw-r--r-- | src/shared/dlt_shm.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/shared/dlt_shm.c b/src/shared/dlt_shm.c index 5f54f88..f330864 100644 --- a/src/shared/dlt_shm.c +++ b/src/shared/dlt_shm.c @@ -211,6 +211,10 @@ int dlt_shm_get_used_size(DltShm *buf) { int ret; + /* check if buffer available */ + if(!buf->buffer.mem) + return -1; + DLT_SHM_SEM_GET(buf->semid); ret = dlt_buffer_get_used_size(&(buf->buffer)); DLT_SHM_SEM_FREE(buf->semid); @@ -227,6 +231,10 @@ int dlt_shm_push(DltShm *buf,const unsigned char *data1,unsigned int size1,const { int ret; + /* check if buffer available */ + if(!buf->buffer.mem) + return -1; + DLT_SHM_SEM_GET(buf->semid); ret = dlt_buffer_push3(&(buf->buffer),data1,size1,data2,size2,data3,size3); DLT_SHM_SEM_FREE(buf->semid); @@ -238,6 +246,10 @@ int dlt_shm_pull(DltShm *buf,unsigned char *data, int max_size) { int ret; + /* check if buffer available */ + if(!buf->buffer.mem) + return -1; + DLT_SHM_SEM_GET(buf->semid); ret = dlt_buffer_pull(&(buf->buffer),data,max_size); DLT_SHM_SEM_FREE(buf->semid); @@ -249,6 +261,10 @@ int dlt_shm_copy(DltShm *buf,unsigned char *data, int max_size) { int ret; + /* check if buffer available */ + if(!buf->buffer.mem) + return -1; + DLT_SHM_SEM_GET(buf->semid); ret = dlt_buffer_copy(&(buf->buffer),data,max_size); DLT_SHM_SEM_FREE(buf->semid); @@ -260,6 +276,10 @@ int dlt_shm_remove(DltShm *buf) { int ret; + /* check if buffer available */ + if(!buf->buffer.mem) + return -1; + DLT_SHM_SEM_GET(buf->semid); ret = dlt_buffer_remove(&(buf->buffer)); DLT_SHM_SEM_FREE(buf->semid); |