1 files changed, 401 insertions, 0 deletions
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
new file mode 100644
index 0000000..1d09f84
--- /dev/null
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
@@ -0,0 +1,401 @@
+/*
+ * 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.
+ */
+
+#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