From 55944e5e40b1be2afc4855d8d2baf4b73d1876b5 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:49:52 +0200 Subject: Adding upstream version 255.4. Signed-off-by: Daniel Baumann --- src/libsystemd/sd-event/event-util.c | 153 +++++++++++++++++++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 src/libsystemd/sd-event/event-util.c (limited to 'src/libsystemd/sd-event/event-util.c') diff --git a/src/libsystemd/sd-event/event-util.c b/src/libsystemd/sd-event/event-util.c new file mode 100644 index 0000000..a310122 --- /dev/null +++ b/src/libsystemd/sd-event/event-util.c @@ -0,0 +1,153 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include + +#include "event-source.h" +#include "event-util.h" +#include "fd-util.h" +#include "log.h" +#include "string-util.h" + +int event_reset_time( + sd_event *e, + sd_event_source **s, + clockid_t clock, + uint64_t usec, + uint64_t accuracy, + sd_event_time_handler_t callback, + void *userdata, + int64_t priority, + const char *description, + bool force_reset) { + + bool created = false; + int enabled, r; + clockid_t c; + + assert(e); + assert(s); + + if (*s) { + if (!force_reset) { + r = sd_event_source_get_enabled(*s, &enabled); + if (r < 0) + return log_debug_errno(r, "sd-event: Failed to query whether event source \"%s\" is enabled or not: %m", + strna((*s)->description ?: description)); + + if (enabled != SD_EVENT_OFF) + return 0; + } + + r = sd_event_source_get_time_clock(*s, &c); + if (r < 0) + return log_debug_errno(r, "sd-event: Failed to get clock id of event source \"%s\": %m", strna((*s)->description ?: description)); + + if (c != clock) + return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), + "sd-event: Current clock id %i of event source \"%s\" is different from specified one %i.", + (int)c, + strna((*s)->description ?: description), + (int)clock); + + r = sd_event_source_set_time(*s, usec); + if (r < 0) + return log_debug_errno(r, "sd-event: Failed to set time for event source \"%s\": %m", strna((*s)->description ?: description)); + + r = sd_event_source_set_time_accuracy(*s, accuracy); + if (r < 0) + return log_debug_errno(r, "sd-event: Failed to set accuracy for event source \"%s\": %m", strna((*s)->description ?: description)); + + /* callback function is not updated, as we do not have sd_event_source_set_time_callback(). */ + + (void) sd_event_source_set_userdata(*s, userdata); + + r = sd_event_source_set_enabled(*s, SD_EVENT_ONESHOT); + if (r < 0) + return log_debug_errno(r, "sd-event: Failed to enable event source \"%s\": %m", strna((*s)->description ?: description)); + } else { + r = sd_event_add_time(e, s, clock, usec, accuracy, callback, userdata); + if (r < 0) + return log_debug_errno(r, "sd-event: Failed to create timer event \"%s\": %m", strna(description)); + + created = true; + } + + r = sd_event_source_set_priority(*s, priority); + if (r < 0) + return log_debug_errno(r, "sd-event: Failed to set priority for event source \"%s\": %m", strna((*s)->description ?: description)); + + if (description) { + r = sd_event_source_set_description(*s, description); + if (r < 0) + return log_debug_errno(r, "sd-event: Failed to set description for event source \"%s\": %m", description); + } + + return created; +} + +int event_reset_time_relative( + sd_event *e, + sd_event_source **s, + clockid_t clock, + uint64_t usec, + uint64_t accuracy, + sd_event_time_handler_t callback, + void *userdata, + int64_t priority, + const char *description, + bool force_reset) { + + int r; + + assert(e); + + if (usec > 0) { + usec_t usec_now; + + r = sd_event_now(e, clock, &usec_now); + if (r < 0) + return log_debug_errno(r, "sd-event: Failed to get the current time: %m"); + + usec = usec_add(usec_now, usec); + } + + return event_reset_time(e, s, clock, usec, accuracy, callback, userdata, priority, description, force_reset); +} + +int event_add_time_change(sd_event *e, sd_event_source **ret, sd_event_io_handler_t callback, void *userdata) { + _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; + _cleanup_close_ int fd = -EBADF; + int r; + + assert(e); + + /* Allocates an IO event source that gets woken up whenever the clock changes. Needs to be recreated on each event */ + + fd = time_change_fd(); + if (fd < 0) + return fd; + + r = sd_event_add_io(e, &s, fd, EPOLLIN, callback, userdata); + if (r < 0) + return r; + + r = sd_event_source_set_io_fd_own(s, true); + if (r < 0) + return r; + + TAKE_FD(fd); + + r = sd_event_source_set_description(s, "time-change"); + if (r < 0) + return r; + + if (ret) + *ret = TAKE_PTR(s); + else { + r = sd_event_source_set_floating(s, true); + if (r < 0) + return r; + } + + return 0; +} -- cgit v1.2.3