59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
#ifndef KERNEL_MSG_H_
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#define KERNEL_MSG_H_
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#include <kernel/btree.h>
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#include <kernel/locks.h>
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#include <magenta/status.h>
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#include <magenta/types.h>
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struct port;
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struct thread;
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enum kmsg_status {
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KMSG_WAIT_RECEIVE,
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KMSG_WAIT_REPLY,
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KMSG_REPLY_SENT,
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KMSG_ASYNC,
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};
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struct msg {
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spin_lock_t msg_lock;
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enum kmsg_status msg_status;
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struct btree_node msg_node;
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msgid_t msg_id;
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union {
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/* only valid for asynchronous messages (msg_status ==
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* KMSG_ASYNC) */
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struct {
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koid_t msg_sender_port_id;
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tid_t msg_sender_thread_id;
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};
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/* only valid for synchronous messages (msg_status !=
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* KMSG_ASYNC) */
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struct {
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struct port *msg_sender_port;
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struct thread *msg_sender_thread;
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};
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};
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kern_status_t msg_result;
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kern_msg_type_t msg_type;
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union {
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/* msg_type = KERN_MSG_TYPE_DATA */
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struct {
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kern_msg_t msg_req, msg_resp;
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};
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/* msg_type = KERN_MSG_TYPE_EVENT */
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struct {
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kern_msg_event_type_t msg_event;
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};
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};
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};
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extern void msg_init(void);
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extern struct msg *msg_alloc(void);
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extern void msg_free(struct msg *msg);
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#endif
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