xnu-2782.1.97.tar.gz

[apple/xnu.git] / iokit / Kernel / IOSimpleReporter.cpp

diff --git a/iokit/Kernel/IOSimpleReporter.cpp b/iokit/Kernel/IOSimpleReporter.cpp
new file mode 100644 (file)
index 0000000..81c8232
--- /dev/null
+++ b/iokit/Kernel/IOSimpleReporter.cpp
@@ -0,0 +1,161 @@
+/*
+ * Copyright (c) 2012-2013 Apple Computer, Inc.  All Rights Reserved.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+#include <IOKit/IOKernelReportStructs.h>
+#include <IOKit/IOKernelReporters.h>
+#include "IOReporterDefs.h"
+
+#define super IOReporter
+OSDefineMetaClassAndStructors(IOSimpleReporter, IOReporter);
+
+/* static */
+IOSimpleReporter*
+IOSimpleReporter::with(IOService *reportingService,
+                       IOReportCategories categories,
+                       IOReportUnits unit)
+{
+    IOSimpleReporter *reporter, *rval = NULL;
+
+    // kprintf("%s\n", __func__);      // can't IORLOG() from static
+
+    reporter = new IOSimpleReporter;
+    if (!reporter)      goto finish;
+
+
+    if (!reporter->initWith(reportingService, categories, unit)) {
+        goto finish;
+    }
+    
+    // success
+    rval = reporter;
+    
+finish:
+    if (!rval) {
+        if (reporter)       delete reporter;
+    }
+    
+    return rval;
+}
+
+bool
+IOSimpleReporter::initWith(IOService *reportingService,
+                           IOReportCategories categories,
+                           IOReportUnits unit)
+{
+    // fully specify the channel type for the superclass
+    IOReportChannelType channelType = {
+        .categories = categories,
+        .report_format = kIOReportFormatSimple,
+        .nelements = 1,
+        .element_idx = 0
+    };
+    
+    return super::init(reportingService, channelType, unit);
+}
+
+
+IOReturn
+IOSimpleReporter::setValue(uint64_t channel_id,
+                           int64_t value)
+{
+    IOReturn res = kIOReturnError;
+    IOSimpleReportValues simple_values;
+    int element_index = 0;
+    
+    lockReporter();
+    
+    if (getFirstElementIndex(channel_id, &element_index) != kIOReturnSuccess) {
+        res = kIOReturnBadArgument;
+        goto finish;
+    }
+
+
+    if (copyElementValues(element_index, (IOReportElementValues *)&simple_values) != kIOReturnSuccess) {
+        res = kIOReturnBadArgument;
+        goto finish;
+    }
+    
+    simple_values.simple_value = value;
+    res = setElementValues(element_index, (IOReportElementValues *)&simple_values);
+    
+finish:
+    unlockReporter();
+    return res;
+}
+
+
+IOReturn
+IOSimpleReporter::incrementValue(uint64_t channel_id,
+                                 int64_t increment)
+{
+    IOReturn res = kIOReturnError;
+    IOSimpleReportValues simple_values;
+    int element_index = 0;
+    
+    lockReporter();
+    
+    if (getFirstElementIndex(channel_id, &element_index) != kIOReturnSuccess) {
+        res = kIOReturnBadArgument;
+        goto finish;
+    }
+
+    if (copyElementValues(element_index, (IOReportElementValues *)&simple_values) != kIOReturnSuccess){
+        res = kIOReturnBadArgument;
+        goto finish;
+    }
+    
+    simple_values.simple_value += increment;
+    
+    res = setElementValues(element_index, (IOReportElementValues *)&simple_values);
+    
+finish:
+    unlockReporter();
+    return res;
+}
+
+int64_t
+IOSimpleReporter::getValue(uint64_t channel_id)
+{
+    IOSimpleReportValues *values = NULL;
+    int64_t simple_value = (int64_t)kIOReportInvalidValue;
+    int index = 0;
+    
+    lockReporter();
+    
+    if (getFirstElementIndex(channel_id, &index) == kIOReturnSuccess) {
+        
+        values = (IOSimpleReportValues *)getElementValues(index);
+        
+        if (values != NULL)
+            simple_value = values->simple_value;
+    }
+    
+    unlockReporter();
+    return simple_value;
+}
+