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Merge pull request #142 from grissiom/pipe-device 

device/pipe: add rt_pipe_{init,detach}
This commit is contained in:
Bernard Xiong 2013-08-18 21:47:46 -07:00
parent cb880fd763 38ce3879d8
commit 90c9c8a27a
2 changed files with 71 additions and 38 deletions
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7
components/drivers/include/rtdevice.h
View File

@ -172,8 +172,15 @@ rt_inline rt_uint16_t rt_ringbuffer_get_size(struct rt_ringbuffer *rb)
/**
* Pipe Device
*/
rt_err_t rt_pipe_init(struct rt_pipe_device *pipe,
const char *name,
rt_uint8_t *buf,
rt_size_t size);
rt_err_t rt_pipe_detach(struct rt_pipe_device *pipe);
#ifdef RT_USING_HEAP
rt_err_t rt_pipe_create(const char *name, rt_size_t size);
void rt_pipe_destroy(struct rt_pipe_device *pipe);
#endif
/**
* DataQueue for DeviceDriver

102
components/drivers/src/pipe.c
View File

@ -151,54 +151,79 @@ static rt_err_t rt_pipe_control(rt_device_t dev, rt_uint8_t cmd, void *args)
return RT_EOK;
}
/**
* This function will initialize a pipe device and put it under control of
* resource management.
*
* @param pipe the pipe device
* @param name the name of pipe device
* @param buf the buffer of pipe device
* @param size the size of pipe device buffer
*
* @return the operation status, RT_EOK on successful
*/
rt_err_t rt_pipe_init(struct rt_pipe_device *pipe,
const char *name,
rt_uint8_t *buf,
rt_size_t size)
{
RT_ASSERT(pipe);
RT_ASSERT(buf);
/* initialize suspended list */
rt_list_init(&pipe->suspended_read_list);
rt_list_init(&pipe->suspended_write_list);
/* initialize ring buffer */
rt_ringbuffer_init(&pipe->ringbuffer, buf, size);
/* create pipe */
pipe->parent.type = RT_Device_Class_Char;
pipe->parent.init = RT_NULL;
pipe->parent.open = RT_NULL;
pipe->parent.close = RT_NULL;
pipe->parent.read = rt_pipe_read;
pipe->parent.write = rt_pipe_write;
pipe->parent.control = rt_pipe_control;
return rt_device_register(&(pipe->parent), name, RT_DEVICE_FLAG_RDWR);
}
RTM_EXPORT(rt_pipe_init);
/**
* This function will detach a pipe device from resource management
*
* @param pipe the pipe device
*
* @return the operation status, RT_EOK on successful
*/
rt_err_t rt_pipe_detach(struct rt_pipe_device *pipe)
{
return rt_device_unregister(&pipe->parent);
}
RTM_EXPORT(rt_pipe_detach);
#ifdef RT_USING_HEAP
rt_err_t rt_pipe_create(const char *name, rt_size_t size)
{
rt_err_t result = RT_EOK;
rt_uint8_t *rb_memptr = RT_NULL;
struct rt_pipe_device *pipe = RT_NULL;
/* get aligned size */
size = RT_ALIGN(size, RT_ALIGN_SIZE);
pipe = (struct rt_pipe_device *)rt_calloc(1, sizeof(struct rt_pipe_device));
if (pipe != RT_NULL)
if (pipe == RT_NULL)
return -RT_ENOMEM;
/* create ring buffer of pipe */
rb_memptr = rt_malloc(size);
if (rb_memptr == RT_NULL)
{
/* create ring buffer of pipe */
rb_memptr = rt_malloc(size);
if (rb_memptr == RT_NULL)
{
result = -RT_ENOMEM;
goto __exit;
}
/* initialize suspended list */
rt_list_init(&pipe->suspended_read_list);
rt_list_init(&pipe->suspended_write_list);
/* initialize ring buffer */
rt_ringbuffer_init(&pipe->ringbuffer, rb_memptr, size);
/* create device */
pipe->parent.type = RT_Device_Class_Char;
pipe->parent.init = RT_NULL;
pipe->parent.open = RT_NULL;
pipe->parent.close = RT_NULL;
pipe->parent.read = rt_pipe_read;
pipe->parent.write = rt_pipe_write;
pipe->parent.control = rt_pipe_control;
return rt_device_register(&(pipe->parent), name, RT_DEVICE_FLAG_RDWR);
}
else
{
result = -RT_ENOMEM;
}
__exit:
if (pipe != RT_NULL)
rt_free(pipe);
if (rb_memptr != RT_NULL)
rt_free(rb_memptr);
return -RT_ENOMEM;
}
return result;
return rt_pipe_init(pipe, name, rb_memptr, size);
}
RTM_EXPORT(rt_pipe_create);
@ -208,7 +233,7 @@ void rt_pipe_destroy(struct rt_pipe_device *pipe)
return;
/* un-register pipe device */
rt_device_unregister(&(pipe->parent));
rt_pipe_detach(pipe);
/* release memory */
rt_free(pipe->ringbuffer.buffer_ptr);
@ -217,3 +242,4 @@ void rt_pipe_destroy(struct rt_pipe_device *pipe)
return;
}
RTM_EXPORT(rt_pipe_destroy);
#endif /* RT_USING_HEAP */