auto import from //depot/cupcake/@135843
diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp b/libs/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
new file mode 100644
index 0000000..f75e5c2
--- /dev/null
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
@@ -0,0 +1,403 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "SurfaceFlinger"
+
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/resource.h>
+
+#include <linux/unistd.h>
+
+#include <utils/Log.h>
+
+#include "DisplayHardware/DisplayHardwareBase.h"
+#include "SurfaceFlinger.h"
+
+// ----------------------------------------------------------------------------
+// the sim build doesn't have gettid
+
+#ifndef HAVE_GETTID
+# define gettid getpid
+#endif
+
+// ----------------------------------------------------------------------------
+namespace android {
+
+static char const * kSleepFileName = "/sys/power/wait_for_fb_sleep";
+static char const * kWakeFileName = "/sys/power/wait_for_fb_wake";
+static char const * const kOldSleepFileName = "/sys/android_power/wait_for_fb_sleep";
+static char const * const kOldWakeFileName = "/sys/android_power/wait_for_fb_wake";
+
+// This dir exists if the framebuffer console is present, either built into
+// the kernel or loaded as a module.
+static char const * const kFbconSysDir = "/sys/class/graphics/fbcon";
+
+// ----------------------------------------------------------------------------
+
+DisplayHardwareBase::DisplayEventThreadBase::DisplayEventThreadBase(
+ const sp<SurfaceFlinger>& flinger)
+ : Thread(false), mFlinger(flinger) {
+}
+
+DisplayHardwareBase::DisplayEventThreadBase::~DisplayEventThreadBase() {
+}
+
+// ----------------------------------------------------------------------------
+
+DisplayHardwareBase::DisplayEventThread::DisplayEventThread(
+ const sp<SurfaceFlinger>& flinger)
+ : DisplayEventThreadBase(flinger)
+{
+}
+
+DisplayHardwareBase::DisplayEventThread::~DisplayEventThread()
+{
+}
+
+bool DisplayHardwareBase::DisplayEventThread::threadLoop()
+{
+ int err = 0;
+ char buf;
+ int fd;
+
+ fd = open(kSleepFileName, O_RDONLY, 0);
+ do {
+ err = read(fd, &buf, 1);
+ } while (err < 0 && errno == EINTR);
+ close(fd);
+ LOGW_IF(err<0, "ANDROID_WAIT_FOR_FB_SLEEP failed (%s)", strerror(errno));
+ if (err >= 0) {
+ sp<SurfaceFlinger> flinger = mFlinger.promote();
+ LOGD("About to give-up screen, flinger = %p", flinger.get());
+ if (flinger != 0) {
+ mBarrier.close();
+ flinger->screenReleased(0);
+ mBarrier.wait();
+ }
+ }
+ fd = open(kWakeFileName, O_RDONLY, 0);
+ do {
+ err = read(fd, &buf, 1);
+ } while (err < 0 && errno == EINTR);
+ close(fd);
+ LOGW_IF(err<0, "ANDROID_WAIT_FOR_FB_WAKE failed (%s)", strerror(errno));
+ if (err >= 0) {
+ sp<SurfaceFlinger> flinger = mFlinger.promote();
+ LOGD("Screen about to return, flinger = %p", flinger.get());
+ if (flinger != 0)
+ flinger->screenAcquired(0);
+ }
+ return true;
+}
+
+status_t DisplayHardwareBase::DisplayEventThread::releaseScreen() const
+{
+ mBarrier.open();
+ return NO_ERROR;
+}
+
+status_t DisplayHardwareBase::DisplayEventThread::readyToRun()
+{
+ if (access(kSleepFileName, R_OK) || access(kWakeFileName, R_OK)) {
+ if (access(kOldSleepFileName, R_OK) || access(kOldWakeFileName, R_OK)) {
+ LOGE("Couldn't open %s or %s", kSleepFileName, kWakeFileName);
+ return NO_INIT;
+ }
+ kSleepFileName = kOldSleepFileName;
+ kWakeFileName = kOldWakeFileName;
+ }
+ return NO_ERROR;
+}
+
+status_t DisplayHardwareBase::DisplayEventThread::initCheck() const
+{
+ return (((access(kSleepFileName, R_OK) == 0 &&
+ access(kWakeFileName, R_OK) == 0) ||
+ (access(kOldSleepFileName, R_OK) == 0 &&
+ access(kOldWakeFileName, R_OK) == 0)) &&
+ access(kFbconSysDir, F_OK) != 0) ? NO_ERROR : NO_INIT;
+}
+
+// ----------------------------------------------------------------------------
+
+pid_t DisplayHardwareBase::ConsoleManagerThread::sSignalCatcherPid = 0;
+
+DisplayHardwareBase::ConsoleManagerThread::ConsoleManagerThread(
+ const sp<SurfaceFlinger>& flinger)
+ : DisplayEventThreadBase(flinger), consoleFd(-1)
+{
+ sSignalCatcherPid = 0;
+
+ // create a new console
+ char const * const ttydev = "/dev/tty0";
+ int fd = open(ttydev, O_RDWR | O_SYNC);
+ if (fd<0) {
+ LOGE("Can't open %s", ttydev);
+ this->consoleFd = -errno;
+ return;
+ }
+
+ // to make sure that we are in text mode
+ int res = ioctl(fd, KDSETMODE, (void*) KD_TEXT);
+ if (res<0) {
+ LOGE("ioctl(%d, KDSETMODE, ...) failed, res %d (%s)",
+ fd, res, strerror(errno));
+ }
+
+ // get the current console
+ struct vt_stat vs;
+ res = ioctl(fd, VT_GETSTATE, &vs);
+ if (res<0) {
+ LOGE("ioctl(%d, VT_GETSTATE, ...) failed, res %d (%s)",
+ fd, res, strerror(errno));
+ this->consoleFd = -errno;
+ return;
+ }
+
+ // switch to console 7 (which is what X normaly uses)
+ int vtnum = 7;
+ do {
+ res = ioctl(fd, VT_ACTIVATE, (void*)vtnum);
+ } while(res < 0 && errno == EINTR);
+ if (res<0) {
+ LOGE("ioctl(%d, VT_ACTIVATE, ...) failed, %d (%s) for %d",
+ fd, errno, strerror(errno), vtnum);
+ this->consoleFd = -errno;
+ return;
+ }
+
+ do {
+ res = ioctl(fd, VT_WAITACTIVE, (void*)vtnum);
+ } while(res < 0 && errno == EINTR);
+ if (res<0) {
+ LOGE("ioctl(%d, VT_WAITACTIVE, ...) failed, %d %d %s for %d",
+ fd, res, errno, strerror(errno), vtnum);
+ this->consoleFd = -errno;
+ return;
+ }
+
+ // open the new console
+ close(fd);
+ fd = open(ttydev, O_RDWR | O_SYNC);
+ if (fd<0) {
+ LOGE("Can't open new console %s", ttydev);
+ this->consoleFd = -errno;
+ return;
+ }
+
+ /* disable console line buffer, echo, ... */
+ struct termios ttyarg;
+ ioctl(fd, TCGETS , &ttyarg);
+ ttyarg.c_iflag = 0;
+ ttyarg.c_lflag = 0;
+ ioctl(fd, TCSETS , &ttyarg);
+
+ // set up signals so we're notified when the console changes
+ // we can't use SIGUSR1 because it's used by the java-vm
+ vm.mode = VT_PROCESS;
+ vm.waitv = 0;
+ vm.relsig = SIGUSR2;
+ vm.acqsig = SIGUNUSED;
+ vm.frsig = 0;
+
+ struct sigaction act;
+ sigemptyset(&act.sa_mask);
+ act.sa_handler = sigHandler;
+ act.sa_flags = 0;
+ sigaction(vm.relsig, &act, NULL);
+
+ sigemptyset(&act.sa_mask);
+ act.sa_handler = sigHandler;
+ act.sa_flags = 0;
+ sigaction(vm.acqsig, &act, NULL);
+
+ sigset_t mask;
+ sigemptyset(&mask);
+ sigaddset(&mask, vm.relsig);
+ sigaddset(&mask, vm.acqsig);
+ sigprocmask(SIG_BLOCK, &mask, NULL);
+
+ // switch to graphic mode
+ res = ioctl(fd, KDSETMODE, (void*)KD_GRAPHICS);
+ LOGW_IF(res<0,
+ "ioctl(%d, KDSETMODE, KD_GRAPHICS) failed, res %d", fd, res);
+
+ this->prev_vt_num = vs.v_active;
+ this->vt_num = vtnum;
+ this->consoleFd = fd;
+}
+
+DisplayHardwareBase::ConsoleManagerThread::~ConsoleManagerThread()
+{
+ if (this->consoleFd >= 0) {
+ int fd = this->consoleFd;
+ int prev_vt_num = this->prev_vt_num;
+ int res;
+ ioctl(fd, KDSETMODE, (void*)KD_TEXT);
+ do {
+ res = ioctl(fd, VT_ACTIVATE, (void*)prev_vt_num);
+ } while(res < 0 && errno == EINTR);
+ do {
+ res = ioctl(fd, VT_WAITACTIVE, (void*)prev_vt_num);
+ } while(res < 0 && errno == EINTR);
+ close(fd);
+ char const * const ttydev = "/dev/tty0";
+ fd = open(ttydev, O_RDWR | O_SYNC);
+ ioctl(fd, VT_DISALLOCATE, 0);
+ close(fd);
+ }
+}
+
+status_t DisplayHardwareBase::ConsoleManagerThread::readyToRun()
+{
+ if (this->consoleFd >= 0) {
+ sSignalCatcherPid = gettid();
+
+ sigset_t mask;
+ sigemptyset(&mask);
+ sigaddset(&mask, vm.relsig);
+ sigaddset(&mask, vm.acqsig);
+ sigprocmask(SIG_BLOCK, &mask, NULL);
+
+ int res = ioctl(this->consoleFd, VT_SETMODE, &vm);
+ if (res<0) {
+ LOGE("ioctl(%d, VT_SETMODE, ...) failed, %d (%s)",
+ this->consoleFd, errno, strerror(errno));
+ }
+ return NO_ERROR;
+ }
+ return this->consoleFd;
+}
+
+void DisplayHardwareBase::ConsoleManagerThread::requestExit()
+{
+ Thread::requestExit();
+ if (sSignalCatcherPid != 0) {
+ // wake the thread up
+ kill(sSignalCatcherPid, SIGINT);
+ // wait for it...
+ }
+}
+
+void DisplayHardwareBase::ConsoleManagerThread::sigHandler(int sig)
+{
+ // resend the signal to our signal catcher thread
+ LOGW("received signal %d in thread %d, resending to %d",
+ sig, gettid(), sSignalCatcherPid);
+
+ // we absolutely need the delays below because without them
+ // our main thread never gets a chance to handle the signal.
+ usleep(10000);
+ kill(sSignalCatcherPid, sig);
+ usleep(10000);
+}
+
+status_t DisplayHardwareBase::ConsoleManagerThread::releaseScreen() const
+{
+ int fd = this->consoleFd;
+ int err = ioctl(fd, VT_RELDISP, (void*)1);
+ LOGE_IF(err<0, "ioctl(%d, VT_RELDISP, 1) failed %d (%s)",
+ fd, errno, strerror(errno));
+ return (err<0) ? (-errno) : status_t(NO_ERROR);
+}
+
+bool DisplayHardwareBase::ConsoleManagerThread::threadLoop()
+{
+ sigset_t mask;
+ sigemptyset(&mask);
+ sigaddset(&mask, vm.relsig);
+ sigaddset(&mask, vm.acqsig);
+
+ int sig = 0;
+ sigwait(&mask, &sig);
+
+ if (sig == vm.relsig) {
+ sp<SurfaceFlinger> flinger = mFlinger.promote();
+ //LOGD("About to give-up screen, flinger = %p", flinger.get());
+ if (flinger != 0)
+ flinger->screenReleased(0);
+ } else if (sig == vm.acqsig) {
+ sp<SurfaceFlinger> flinger = mFlinger.promote();
+ //LOGD("Screen about to return, flinger = %p", flinger.get());
+ if (flinger != 0)
+ flinger->screenAcquired(0);
+ }
+
+ return true;
+}
+
+status_t DisplayHardwareBase::ConsoleManagerThread::initCheck() const
+{
+ return consoleFd >= 0 ? NO_ERROR : NO_INIT;
+}
+
+// ----------------------------------------------------------------------------
+
+DisplayHardwareBase::DisplayHardwareBase(const sp<SurfaceFlinger>& flinger,
+ uint32_t displayIndex)
+ : mCanDraw(true)
+{
+ mDisplayEventThread = new DisplayEventThread(flinger);
+ if (mDisplayEventThread->initCheck() != NO_ERROR) {
+ // fall-back on the console
+ mDisplayEventThread = new ConsoleManagerThread(flinger);
+ }
+}
+
+DisplayHardwareBase::~DisplayHardwareBase()
+{
+ // request exit
+ mDisplayEventThread->requestExitAndWait();
+}
+
+
+bool DisplayHardwareBase::canDraw() const
+{
+ return mCanDraw;
+}
+
+void DisplayHardwareBase::releaseScreen() const
+{
+ status_t err = mDisplayEventThread->releaseScreen();
+ if (err >= 0) {
+ //LOGD("screen given-up");
+ mCanDraw = false;
+ }
+}
+
+void DisplayHardwareBase::acquireScreen() const
+{
+ status_t err = mDisplayEventThread->acquireScreen();
+ if (err >= 0) {
+ //LOGD("screen returned");
+ mCanDraw = true;
+ }
+}
+
+}; // namespace android