To complete the previous patch that implemented properties in rtkit,
here's the client-side code that tests that the properties work, and make
them more accessible for the casual C programmer.
// David
>From 309659d47396544cd2b8d97ac5dac4460f543723 Mon Sep 17 00:00:00 2001
From: David Henningsson <di...@ubuntu.com>
Date: Sun, 7 Feb 2010 13:18:00 +0100
Subject: [PATCH] Implement client-side testing of property retrieval
---
rtkit-test.c | 22 ++++++++++--
rtkit.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
rtkit.h | 17 +++++++++
3 files changed, 150 insertions(+), 3 deletions(-)
diff --git a/rtkit-test.c b/rtkit-test.c
index 2841b52..9d2703f 100644
--- a/rtkit-test.c
+++ b/rtkit-test.c
@@ -76,7 +76,8 @@ static void print_status(const char *t) {
int main(int argc, char *argv[]) {
DBusError error;
DBusConnection *bus;
- int r;
+ int r, r2;
+ long long r3;
struct rlimit rlim;
dbus_error_init(&error);
@@ -86,6 +87,21 @@ int main(int argc, char *argv[]) {
return 1;
}
+ if ((r = rtkit_get_max_realtime_priority(bus)) < 0)
+ fprintf(stderr, "Failed to retrieve max realtime priority: %s\n", strerror(-r));
+ else
+ printf("Max realtime priority is: %d\n", r);
+
+ if ((r2 = rtkit_get_min_nice_level(bus, &r)))
+ fprintf(stderr, "Failed to retrieve min nice level: %s\n", strerror(-r2));
+ else
+ printf("Min nice level is: %d\n", r);
+
+ if ((r3 = rtkit_get_rttime_nsec_max(bus)) < 0)
+ fprintf(stderr, "Failed to retrieve rttime limit: %s\n", strerror(-r3));
+ else
+ printf("Rttime limit is: %lld ns\n", r3);
+
memset(&rlim, 0, sizeof(rlim));
rlim.rlim_cur = rlim.rlim_max = 100000000ULL; /* 100ms */
if ((setrlimit(RLIMIT_RTTIME, &rlim) < 0))
@@ -96,14 +112,14 @@ int main(int argc, char *argv[]) {
if ((r = rtkit_make_high_priority(bus, 0, -10)) < 0)
fprintf(stderr, "Failed to become high priority: %s\n", strerror(-r));
else
- printf("Sucessfully became high priority.\n");
+ printf("Successfully became high priority.\n");
print_status("after high priority");
if ((r = rtkit_make_realtime(bus, 0, 10)) < 0)
fprintf(stderr, "Failed to become realtime: %s\n", strerror(-r));
else
- printf("Sucessfully became realtime.\n");
+ printf("Successfully became realtime.\n");
print_status("after realtime");
diff --git a/rtkit.c b/rtkit.c
index aecc4e3..181f3de 100644
--- a/rtkit.c
+++ b/rtkit.c
@@ -2,6 +2,7 @@
/***
Copyright 2009 Lennart Poettering
+ Copyright 2010 David Henningsson <di...@ubuntu.com>
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation files
@@ -56,6 +57,107 @@ static int translate_error(const char *name) {
return -EIO;
}
+
+static long long rtkit_get_int_property(DBusConnection *connection, const char* propname, long long* propval) {
+ DBusMessage *m = NULL, *r = NULL;
+ DBusMessageIter iter, subiter;
+ dbus_int64_t i64;
+ dbus_int32_t i32;
+ DBusError error;
+ int current_type;
+ long long ret;
+ const char * interfacestr = "org.freedesktop.RealtimeKit1";
+
+ dbus_error_init(&error);
+
+ if (!(m = dbus_message_new_method_call(
+ RTKIT_SERVICE_NAME,
+ RTKIT_OBJECT_PATH,
+ "org.freedesktop.DBus.Properties",
+ "Get"))) {
+ ret = -ENOMEM;
+ goto finish;
+ }
+
+ if (!dbus_message_append_args(
+ m,
+ DBUS_TYPE_STRING, &interfacestr,
+ DBUS_TYPE_STRING, &propname,
+ DBUS_TYPE_INVALID)) {
+ ret = -ENOMEM;
+ goto finish;
+ }
+
+ if (!(r = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
+ ret = translate_error(error.name);
+ goto finish;
+ }
+
+ if (dbus_set_error_from_message(&error, r)) {
+ ret = translate_error(error.name);
+ goto finish;
+ }
+
+ ret = -EBADMSG;
+ dbus_message_iter_init(r, &iter);
+ while ((current_type = dbus_message_iter_get_arg_type (&iter)) != DBUS_TYPE_INVALID) {
+ if (current_type == DBUS_TYPE_VARIANT) {
+ dbus_message_iter_recurse(&iter, &subiter);
+ while ((current_type = dbus_message_iter_get_arg_type (&subiter)) != DBUS_TYPE_INVALID) {
+ if (current_type == DBUS_TYPE_INT32) {
+ dbus_message_iter_get_basic(&subiter, &i32);
+ *propval = i32;
+ ret = 0;
+ }
+ if (current_type == DBUS_TYPE_INT64) {
+ dbus_message_iter_get_basic(&subiter, &i64);
+ *propval = i64;
+ ret = 0;
+ }
+ dbus_message_iter_next (&subiter);
+ }
+ }
+ dbus_message_iter_next (&iter);
+ }
+
+finish:
+
+ if (m)
+ dbus_message_unref(m);
+
+ if (r)
+ dbus_message_unref(r);
+
+ dbus_error_free(&error);
+
+ return ret;
+}
+
+int rtkit_get_max_realtime_priority(DBusConnection *connection) {
+ long long retval;
+ int err;
+ err = rtkit_get_int_property(connection, "MaxRealtimePriority", &retval);
+ return err < 0 ? err : retval;
+}
+
+int rtkit_get_min_nice_level(DBusConnection *connection, int* min_nice_level) {
+ long long retval;
+ int err;
+ err = rtkit_get_int_property(connection, "MinNiceLevel", &retval);
+ if (!err) {
+ *min_nice_level = retval;
+ }
+ return err;
+}
+
+long long rtkit_get_rttime_nsec_max(DBusConnection *connection) {
+ long long retval;
+ int err;
+ err = rtkit_get_int_property(connection, "RTTimeNSecMax", &retval);
+ return err < 0 ? err : retval;
+}
+
+
int rtkit_make_realtime(DBusConnection *connection, pid_t thread, int priority) {
DBusMessage *m = NULL, *r = NULL;
dbus_uint64_t u64;
@@ -186,4 +288,16 @@ int rtkit_make_high_priority(DBusConnection *connection, pid_t thread, int nice_
return -ENOTSUP;
}
+int rtkit_get_max_realtime_priority(DBusConnection *connection) {
+ return -ENOTSUP;
+}
+
+int rtkit_get_min_nice_level(DBusConnection *connection, int* min_nice_level) {
+ return -ENOTSUP;
+}
+
+long long rtkit_get_rttime_nsec_max(DBusConnection *connection) {
+ return -ENOTSUP;
+}
+
#endif
diff --git a/rtkit.h b/rtkit.h
index 2081b4e..d01f65f 100644
--- a/rtkit.h
+++ b/rtkit.h
@@ -5,6 +5,7 @@
/***
Copyright 2009 Lennart Poettering
+ Copyright 2010 David Henningsson <di...@ubuntu.com>
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation files
@@ -55,6 +56,22 @@ int rtkit_make_realtime(DBusConnection *system_bus, pid_t thread, int priority);
* on success.*/
int rtkit_make_high_priority(DBusConnection *system_bus, pid_t thread, int nice_level);
+/* Return the maximum value of realtime priority available. Realtime requests
+ * above this value will fail. A negative value is an errno style error code.
+ */
+int rtkit_get_max_realtime_priority(DBusConnection *system_bus);
+
+/* Retreive the minimum value of nice level available. High prio requests
+ * below this value will fail. The returned value is a negative errno
+ * style error code, or 0 on success.*/
+int rtkit_get_min_nice_level(DBusConnection *system_bus, int* min_nice_level);
+
+/* Return the maximum value of RLIMIT_RTTIME to set before attempting a
+ * realtime request. A negative value is an errno style error code.
+ */
+long long rtkit_get_rttime_nsec_max(DBusConnection *system_bus);
+
+
#ifdef __cplusplus
}
#endif
--
1.6.5
_______________________________________________
pulseaudio-discuss mailing list
pulseaudio-discuss@mail.0pointer.de
https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss
