Changeset 111b9b9 in mainline for kernel/generic/include/time/timeout.h

Timestamp:

2023-02-11T19:13:44Z (19 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

4777e02

Parents:

76e17d7c

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2022-08-15 17:46:39)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-02-11 19:13:44)

Message:

Reimplement waitq using thread_wait/wakeup

This adds a few functions to the thread API which can be
summarized as "stop running until woken up by others".
The ordering and context-switching concerns are thus yeeted
to this abstraction and waitq only deals with maintaining
the queues. Overall, this makes the control flow in waitq
much easier to navigate.

File:

• kernel/generic/include/time/timeout.h (modified) (2 diffs)

kernel/generic/include/time/timeout.h

@@ -42 +42 @@
 typedef void (*timeout_handler_t)(void *arg);
 
+typedef uint64_t deadline_t;
+#define DEADLINE_NEVER ((deadline_t) UINT64_MAX)
+
 typedef struct {
         /** Link to the list of active timeouts on timeout->cpu */
         link_t link;
         /** Timeout will be activated when current clock tick reaches this value. */
-        uint64_t deadline;
+        deadline_t deadline;
         /** Function that will be called on timeout activation. */
         timeout_handler_t handler;
@@ -59 +62 @@
 #define us2ticks(us)  ((uint64_t) (((uint32_t) (us) / (1000000 / HZ))))
 
+extern deadline_t timeout_deadline_in_usec(uint32_t us);
+
 extern void timeout_init(void);
 extern void timeout_initialize(timeout_t *);
 extern void timeout_register(timeout_t *, uint64_t, timeout_handler_t, void *);
+extern void timeout_register_deadline(timeout_t *, deadline_t, timeout_handler_t, void *);
 extern bool timeout_unregister(timeout_t *);