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kernel: Allow k_poll on message queues

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This commit adds the ability to use a message queue as a
k_poll object. It follows the same pattern as polling on
FIFOs.

This change has been proven in practice at Samsara.

Fixes: #26728

Signed-off-by: Nick Graves <nicholas.graves@samsara.com>
This commit is contained in:
Nick Graves 2021-04-12 12:35:18 -07:00 • committed by Anas Nashif
commit b445f13462
3 changed files with 42 additions and 1 deletions
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12
include/kernel.h
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@ -4126,6 +4126,8 @@ struct k_msgq {
/** Number of used messages */
uint32_t used_msgs;
_POLL_EVENT;
_OBJECT_TRACING_NEXT_PTR(k_msgq)
_OBJECT_TRACING_LINKED_FLAG
@ -4147,6 +4149,7 @@ struct k_msgq {
.read_ptr = q_buffer, \
.write_ptr = q_buffer, \
.used_msgs = 0, \
_POLL_EVENT_OBJ_INIT(obj) \
_OBJECT_TRACING_INIT \
}
@ -5098,6 +5101,9 @@ enum _poll_types_bits {
/* queue/FIFO/LIFO data availability */
_POLL_TYPE_DATA_AVAILABLE,
/* msgq data availability */
_POLL_TYPE_MSGQ_DATA_AVAILABLE,
_POLL_NUM_TYPES
};
@ -5120,6 +5126,9 @@ enum _poll_states_bits {
/* queue/FIFO/LIFO wait was cancelled */
_POLL_STATE_CANCELLED,
/* data is available to read on a message queue */
_POLL_STATE_MSGQ_DATA_AVAILABLE,
_POLL_NUM_STATES
};
@ -5150,6 +5159,7 @@ enum _poll_states_bits {
#define K_POLL_TYPE_SEM_AVAILABLE Z_POLL_TYPE_BIT(_POLL_TYPE_SEM_AVAILABLE)
#define K_POLL_TYPE_DATA_AVAILABLE Z_POLL_TYPE_BIT(_POLL_TYPE_DATA_AVAILABLE)
#define K_POLL_TYPE_FIFO_DATA_AVAILABLE K_POLL_TYPE_DATA_AVAILABLE
#define K_POLL_TYPE_MSGQ_DATA_AVAILABLE Z_POLL_TYPE_BIT(_POLL_TYPE_MSGQ_DATA_AVAILABLE)
/* public - polling modes */
enum k_poll_modes {
@ -5165,6 +5175,7 @@ enum k_poll_modes {
#define K_POLL_STATE_SEM_AVAILABLE Z_POLL_STATE_BIT(_POLL_STATE_SEM_AVAILABLE)
#define K_POLL_STATE_DATA_AVAILABLE Z_POLL_STATE_BIT(_POLL_STATE_DATA_AVAILABLE)
#define K_POLL_STATE_FIFO_DATA_AVAILABLE K_POLL_STATE_DATA_AVAILABLE
#define K_POLL_STATE_MSGQ_DATA_AVAILABLE Z_POLL_STATE_BIT(_POLL_STATE_MSGQ_DATA_AVAILABLE)
#define K_POLL_STATE_CANCELLED Z_POLL_STATE_BIT(_POLL_STATE_CANCELLED)
/* public - poll signal object */
@ -5221,6 +5232,7 @@ struct k_poll_event {
struct k_sem *sem;
struct k_fifo *fifo;
struct k_queue *queue;
struct k_msgq *msgq;
};
};