libsysprof-profile: add scaffolding for battery charge

This is a SysprofInstrument that will eventually contain the contents of
the sysprof-battery-source.c to get battery charge/rate/etc. Note that
this is different from energy usage which will come from RAPL.

src/libsysprof-profile/meson.build

@@ -1,4 +1,5 @@
 libsysprof_profile_public_sources = [
+  'sysprof-battery-charge.c',
   'sysprof-cpu-usage.c',
   'sysprof-disk-usage.c',
   'sysprof-instrument.c',
@@ -21,6 +22,7 @@ libsysprof_profile_private_sources = [
 libsysprof_profile_public_headers = [
   'sysprof-profile.h',
 
+  'sysprof-battery-charge.h',
   'sysprof-cpu-usage.h',
   'sysprof-disk-usage.h',
   'sysprof-instrument.h',

src/libsysprof-profile/sysprof-battery-charge.c

@@ -0,0 +1,121 @@
+/* sysprof-battery-charge.c
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <glib-unix.h>
+#include <glib/gstdio.h>
+
+#include "line-reader-private.h"
+
+#include "sysprof-battery-charge.h"
+#include "sysprof-instrument-private.h"
+#include "sysprof-recording-private.h"
+
+struct _SysprofBatteryCharge
+{
+  SysprofInstrument parent_instance;
+};
+
+struct _SysprofBatteryChargeClass
+{
+  SysprofInstrumentClass parent_class;
+};
+
+G_DEFINE_FINAL_TYPE (SysprofBatteryCharge, sysprof_battery_charge, SYSPROF_TYPE_INSTRUMENT)
+
+typedef struct _Record
+{
+  SysprofRecording *recording;
+  DexFuture        *cancellable;
+} Record;
+
+static void
+record_free (gpointer data)
+{
+  Record *record = data;
+
+  g_clear_object (&record->recording);
+  dex_clear (&record->cancellable);
+  g_free (record);
+}
+
+static DexFuture *
+sysprof_battery_charge_record_fiber (gpointer user_data)
+{
+  G_GNUC_UNUSED SysprofCaptureWriter *writer;
+  Record *record = user_data;
+
+  g_assert (record != NULL);
+  g_assert (SYSPROF_IS_RECORDING (record->recording));
+  g_assert (DEX_IS_FUTURE (record->cancellable));
+
+  writer = _sysprof_recording_writer (record->recording);
+
+  return dex_future_new_for_boolean (TRUE);
+}
+
+static DexFuture *
+sysprof_battery_charge_record (SysprofInstrument *instrument,
+                              SysprofRecording  *recording,
+                              GCancellable      *cancellable)
+{
+  Record *record;
+
+  g_assert (SYSPROF_IS_BATTERY_CHARGE (instrument));
+  g_assert (SYSPROF_IS_RECORDING (recording));
+  g_assert (G_IS_CANCELLABLE (cancellable));
+
+  record = g_new0 (Record, 1);
+  record->recording = g_object_ref (recording);
+  record->cancellable = dex_cancellable_new_from_cancellable (cancellable);
+
+  return dex_scheduler_spawn (NULL, 0,
+                              sysprof_battery_charge_record_fiber,
+                              record,
+                              record_free);
+}
+
+static void
+sysprof_battery_charge_class_init (SysprofBatteryChargeClass *klass)
+{
+  SysprofInstrumentClass *instrument_class = SYSPROF_INSTRUMENT_CLASS (klass);
+
+  instrument_class->record = sysprof_battery_charge_record;
+}
+
+static void
+sysprof_battery_charge_init (SysprofBatteryCharge *self)
+{
+}
+
+SysprofInstrument *
+sysprof_battery_charge_new (void)
+{
+  return g_object_new (SYSPROF_TYPE_BATTERY_CHARGE, NULL);
+}

src/libsysprof-profile/sysprof-battery-charge.h

@@ -0,0 +1,42 @@
+/* sysprof-battery-charge.h
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include "sysprof-instrument.h"
+
+G_BEGIN_DECLS
+
+#define SYSPROF_TYPE_BATTERY_CHARGE         (sysprof_battery_charge_get_type())
+#define SYSPROF_IS_BATTERY_CHARGE(obj)      G_TYPE_CHECK_INSTANCE_TYPE(obj, SYSPROF_TYPE_BATTERY_CHARGE)
+#define SYSPROF_BATTERY_CHARGE(obj)         G_TYPE_CHECK_INSTANCE_CAST(obj, SYSPROF_TYPE_BATTERY_CHARGE, SysprofBatteryCharge)
+#define SYSPROF_BATTERY_CHARGE_CLASS(klass) G_TYPE_CHECK_CLASS_CAST(klass, SYSPROF_TYPE_BATTERY_CHARGE, SysprofBatteryChargeClass)
+
+typedef struct _SysprofBatteryCharge      SysprofBatteryCharge;
+typedef struct _SysprofBatteryChargeClass SysprofBatteryChargeClass;
+
+SYSPROF_AVAILABLE_IN_ALL
+GType              sysprof_battery_charge_get_type (void) G_GNUC_CONST;
+SYSPROF_AVAILABLE_IN_ALL
+SysprofInstrument *sysprof_battery_charge_new      (void);
+
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SysprofBatteryCharge, g_object_unref)
+
+G_END_DECLS

src/libsysprof-profile/sysprof-profile.h

@@ -25,6 +25,7 @@
 G_BEGIN_DECLS
 
 #define SYSPROF_PROFILE_INSIDE
+# include "sysprof-battery-charge.h"
 # include "sysprof-cpu-usage.h"
 # include "sysprof-disk-usage.h"
 # include "sysprof-instrument.h"

src/libsysprof-profile/tests/test-profiler.c

@@ -116,6 +116,7 @@ main (int       argc,
 
   profiler = sysprof_profiler_new ();
 
+  sysprof_profiler_add_instrument (profiler, sysprof_battery_charge_new ());
   sysprof_profiler_add_instrument (profiler, sysprof_cpu_usage_new ());
   sysprof_profiler_add_instrument (profiler, sysprof_disk_usage_new ());
   sysprof_profiler_add_instrument (profiler, sysprof_memory_usage_new ());