libs/rt-thread
libs
/
rt-thread
4
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[DeviceDrivers] Fix pipe memory issue.

This commit is contained in:
Bernard Xiong 2019-12-18 21:38:05 +08:00
parent 78d42efd22
commit 055061a639
1 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
components/drivers/src/pipe.c
View File

@ -19,6 +19,7 @@
static int pipe_fops_open(struct dfs_fd *fd) static int pipe_fops_open(struct dfs_fd *fd)
{ {
int rc = 0;
rt_device_t device; rt_device_t device;
rt_pipe_t *pipe; rt_pipe_t *pipe;
@ -31,6 +32,11 @@ static int pipe_fops_open(struct dfs_fd *fd)
if (device->ref_count == 0) if (device->ref_count == 0)
{ {
pipe->fifo = rt_ringbuffer_create(pipe->bufsz); pipe->fifo = rt_ringbuffer_create(pipe->bufsz);
if (pipe->fifo == RT_NULL)
{
rc = -RT_ENOMEM;
goto __exit;
}
} }
switch (fd->flags & O_ACCMODE) switch (fd->flags & O_ACCMODE)
@ -48,9 +54,10 @@ static int pipe_fops_open(struct dfs_fd *fd)
} }
device->ref_count ++; device->ref_count ++;
__exit:
rt_mutex_release(&(pipe->lock)); rt_mutex_release(&(pipe->lock));
return 0; return rc;
} }
static int pipe_fops_close(struct dfs_fd *fd) static int pipe_fops_close(struct dfs_fd *fd)
@ -90,7 +97,8 @@ static int pipe_fops_close(struct dfs_fd *fd)
if (device->ref_count == 1) if (device->ref_count == 1)
{ {
rt_ringbuffer_destroy(pipe->fifo); if (pipe->fifo != RT_NULL)
rt_ringbuffer_destroy(pipe->fifo);
pipe->fifo = RT_NULL; pipe->fifo = RT_NULL;
} }
device->ref_count --; device->ref_count --;