performance: Add Performance class

New Performance class to allow system CPU control

Change-Id: Ie476aefcec7fc20cab8d747ef7c3994b26fcbb62

1 files changed, 143 insertions, 0 deletions

diff --git a/core/jni/org_codeaurora_Performance.cpp b/core/jni/org_codeaurora_Performance.cpp
new file mode 100644
index 0000000..6a562be
--- /dev/null
+++ b/core/jni/org_codeaurora_Performance.cpp
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *    * Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *    * Neither the name of Code Aurora nor
+ *      the names of its contributors may be used to endorse or promote
+ *      products derived from this software without specific prior written
+ *      permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define LOG_TAG "ANDR-PERF-JNI"
+
+#include "jni.h"
+#include "JNIHelp.h"
+#include <android_runtime/AndroidRuntime.h>
+
+#include <dlfcn.h>
+#include <limits.h>
+#include <string.h>
+
+#include <cutils/properties.h>
+#include <utils/Log.h>
+
+#define LIBRARY_PATH_PREFIX	"/system/lib/"
+
+namespace android
+{
+
+// ----------------------------------------------------------------------------
+
+static void (*cpu_boost)(int) = NULL;
+static void *dlhandle         = NULL;
+
+// ----------------------------------------------------------------------------
+
+static void
+org_codeaurora_performance_native_init()
+{
+    const char *rc;
+    void (*init)(void);
+    char buf[PROPERTY_VALUE_MAX];
+    int len;
+
+    /* Retrieve name of vendor extension library */
+    if (property_get("ro.vendor.extension_library", buf, NULL) <= 0) {
+        return;
+    }
+
+    /* Sanity check - ensure */
+    buf[PROPERTY_VALUE_MAX-1] = '\0';
+    if ((strncmp(buf, LIBRARY_PATH_PREFIX, sizeof(LIBRARY_PATH_PREFIX) - 1) != 0)
+        ||
+        (strstr(buf, "..") != NULL)) {
+        return;
+    }
+
+    dlhandle = dlopen(buf, RTLD_NOW | RTLD_LOCAL);
+    if (dlhandle == NULL) {
+        return;
+    }
+
+    dlerror();
+
+    *(void **) (&cpu_boost) = dlsym(dlhandle, "perf_cpu_boost");
+    if ((rc = dlerror()) != NULL) {
+        goto cleanup;
+    }
+    *(void **) (&init) = dlsym(dlhandle, "libqc_opt_init");
+    if ((rc = dlerror()) != NULL) {
+        goto cleanup;
+    }
+    (*init)();
+    return;
+
+cleanup:
+    cpu_boost = NULL;
+    if (dlhandle) {
+        dlclose(dlhandle);
+        dlhandle = NULL;
+    }
+}
+
+static void
+org_codeaurora_performance_native_deinit(JNIEnv *env, jobject clazz)
+{
+    void (*deinit)(void);
+
+    if (dlhandle) {
+        cpu_boost = NULL;
+
+        *(void **) (&deinit) = dlsym(dlhandle, "libqc_opt_deinit");
+        if (deinit) {
+            (*deinit)();
+        }
+
+        dlclose(dlhandle);
+        dlhandle       = NULL;
+    }
+}
+
+static void
+org_codeaurora_performance_native_cpu_boost(JNIEnv *env, jobject clazz, jint ntasks)
+{
+    if (cpu_boost) {
+        (*cpu_boost)(ntasks);
+    }
+}
+
+// ----------------------------------------------------------------------------
+
+static JNINativeMethod gMethods[] = {
+    {"native_cpu_boost",      "(I)V",                  (void *)org_codeaurora_performance_native_cpu_boost},
+    {"native_deinit",         "()V",                   (void *)org_codeaurora_performance_native_deinit},
+};
+
+
+int register_org_codeaurora_Performance(JNIEnv *env)
+{
+    org_codeaurora_performance_native_init();
+
+    return AndroidRuntime::registerNativeMethods(env,
+            "org/codeaurora/Performance", gMethods, NELEM(gMethods));
+}
+
+}   // namespace android