Remove lock around ref count check in terminate.
Replace the global lock in terminate for the ref count check with atomics and a local lock. Bug: 19072064 Change-Id: I0cfd6564e227a75b8387a8788b16381d5bc2cc88
This commit is contained in:
Michael Lentine
parent
ef1c17ae94
commit
54466bc441
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@ -57,7 +57,7 @@ static bool findExtension(const char* exts, const char* name, size_t nameLen) {
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egl_display_t egl_display_t::sDisplay[NUM_DISPLAYS];
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egl_display_t::egl_display_t() :
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magic('_dpy'), finishOnSwap(false), traceGpuCompletion(false), refs(0) {
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magic('_dpy'), finishOnSwap(false), traceGpuCompletion(false), refs(0), eglIsInitialized(false) {
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}
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egl_display_t::~egl_display_t() {
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@ -120,163 +120,188 @@ EGLDisplay egl_display_t::getDisplay(EGLNativeDisplayType display) {
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EGLBoolean egl_display_t::initialize(EGLint *major, EGLint *minor) {
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Mutex::Autolock _l(lock);
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{
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Mutex::Autolock _rf(refLock);
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refs++;
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if (refs > 1) {
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if (major != NULL)
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*major = VERSION_MAJOR;
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if (minor != NULL)
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*minor = VERSION_MINOR;
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while(!eglIsInitialized) refCond.wait(refLock);
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return EGL_TRUE;
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}
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while(eglIsInitialized) refCond.wait(refLock);
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}
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{
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Mutex::Autolock _l(lock);
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#if EGL_TRACE
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// Called both at early_init time and at this time. (Early_init is pre-zygote, so
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// the information from that call may be stale.)
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initEglTraceLevel();
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initEglDebugLevel();
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#endif
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setGLHooksThreadSpecific(&gHooksNoContext);
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// initialize each EGL and
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// build our own extension string first, based on the extension we know
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// and the extension supported by our client implementation
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egl_connection_t* const cnx = &gEGLImpl;
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cnx->major = -1;
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cnx->minor = -1;
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if (cnx->dso) {
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EGLDisplay idpy = disp.dpy;
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if (cnx->egl.eglInitialize(idpy, &cnx->major, &cnx->minor)) {
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//ALOGD("initialized dpy=%p, ver=%d.%d, cnx=%p",
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// idpy, cnx->major, cnx->minor, cnx);
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// display is now initialized
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disp.state = egl_display_t::INITIALIZED;
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// get the query-strings for this display for each implementation
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disp.queryString.vendor = cnx->egl.eglQueryString(idpy,
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EGL_VENDOR);
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disp.queryString.version = cnx->egl.eglQueryString(idpy,
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EGL_VERSION);
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disp.queryString.extensions = cnx->egl.eglQueryString(idpy,
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EGL_EXTENSIONS);
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disp.queryString.clientApi = cnx->egl.eglQueryString(idpy,
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EGL_CLIENT_APIS);
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} else {
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ALOGW("eglInitialize(%p) failed (%s)", idpy,
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egl_tls_t::egl_strerror(cnx->egl.eglGetError()));
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}
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}
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// the query strings are per-display
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mVendorString.setTo(sVendorString);
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mVersionString.setTo(sVersionString);
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mClientApiString.setTo(sClientApiString);
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mExtensionString.setTo(gBuiltinExtensionString);
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char const* start = gExtensionString;
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char const* end;
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do {
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// find the space separating this extension for the next one
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end = strchr(start, ' ');
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if (end) {
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// length of the extension string
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const size_t len = end - start;
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if (len) {
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// NOTE: we could avoid the copy if we had strnstr.
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const String8 ext(start, len);
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if (findExtension(disp.queryString.extensions, ext.string(),
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len)) {
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mExtensionString.append(start, len+1);
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}
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}
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// process the next extension string, and skip the space.
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start = end + 1;
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}
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} while (end);
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egl_cache_t::get()->initialize(this);
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char value[PROPERTY_VALUE_MAX];
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property_get("debug.egl.finish", value, "0");
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if (atoi(value)) {
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finishOnSwap = true;
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}
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property_get("debug.egl.traceGpuCompletion", value, "0");
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if (atoi(value)) {
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traceGpuCompletion = true;
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}
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if (refs > 0) {
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if (major != NULL)
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*major = VERSION_MAJOR;
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if (minor != NULL)
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*minor = VERSION_MINOR;
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refs++;
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return EGL_TRUE;
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mHibernation.setDisplayValid(true);
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}
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#if EGL_TRACE
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// Called both at early_init time and at this time. (Early_init is pre-zygote, so
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// the information from that call may be stale.)
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initEglTraceLevel();
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initEglDebugLevel();
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#endif
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setGLHooksThreadSpecific(&gHooksNoContext);
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// initialize each EGL and
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// build our own extension string first, based on the extension we know
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// and the extension supported by our client implementation
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egl_connection_t* const cnx = &gEGLImpl;
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cnx->major = -1;
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cnx->minor = -1;
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if (cnx->dso) {
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EGLDisplay idpy = disp.dpy;
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if (cnx->egl.eglInitialize(idpy, &cnx->major, &cnx->minor)) {
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//ALOGD("initialized dpy=%p, ver=%d.%d, cnx=%p",
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// idpy, cnx->major, cnx->minor, cnx);
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// display is now initialized
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disp.state = egl_display_t::INITIALIZED;
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// get the query-strings for this display for each implementation
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disp.queryString.vendor = cnx->egl.eglQueryString(idpy,
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EGL_VENDOR);
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disp.queryString.version = cnx->egl.eglQueryString(idpy,
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EGL_VERSION);
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disp.queryString.extensions = cnx->egl.eglQueryString(idpy,
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EGL_EXTENSIONS);
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disp.queryString.clientApi = cnx->egl.eglQueryString(idpy,
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EGL_CLIENT_APIS);
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} else {
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ALOGW("eglInitialize(%p) failed (%s)", idpy,
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egl_tls_t::egl_strerror(cnx->egl.eglGetError()));
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}
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{
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Mutex::Autolock _rf(refLock);
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eglIsInitialized = true;
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refCond.broadcast();
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}
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// the query strings are per-display
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mVendorString.setTo(sVendorString);
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mVersionString.setTo(sVersionString);
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mClientApiString.setTo(sClientApiString);
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mExtensionString.setTo(gBuiltinExtensionString);
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char const* start = gExtensionString;
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char const* end;
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do {
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// find the space separating this extension for the next one
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end = strchr(start, ' ');
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if (end) {
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// length of the extension string
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const size_t len = end - start;
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if (len) {
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// NOTE: we could avoid the copy if we had strnstr.
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const String8 ext(start, len);
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if (findExtension(disp.queryString.extensions, ext.string(),
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len)) {
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mExtensionString.append(start, len+1);
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}
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}
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// process the next extension string, and skip the space.
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start = end + 1;
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}
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} while (end);
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egl_cache_t::get()->initialize(this);
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char value[PROPERTY_VALUE_MAX];
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property_get("debug.egl.finish", value, "0");
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if (atoi(value)) {
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finishOnSwap = true;
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}
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property_get("debug.egl.traceGpuCompletion", value, "0");
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if (atoi(value)) {
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traceGpuCompletion = true;
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}
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refs++;
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if (major != NULL)
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*major = VERSION_MAJOR;
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if (minor != NULL)
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*minor = VERSION_MINOR;
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mHibernation.setDisplayValid(true);
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return EGL_TRUE;
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}
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EGLBoolean egl_display_t::terminate() {
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Mutex::Autolock _l(lock);
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{
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Mutex::Autolock _rl(refLock);
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if (refs == 0) {
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/*
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* From the EGL spec (3.2):
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* "Termination of a display that has already been terminated,
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* (...), is allowed, but the only effect of such a call is
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* to return EGL_TRUE (...)
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*/
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return EGL_TRUE;
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}
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if (refs == 0) {
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/*
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* From the EGL spec (3.2):
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* "Termination of a display that has already been terminated,
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* (...), is allowed, but the only effect of such a call is
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* to return EGL_TRUE (...)
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*/
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return EGL_TRUE;
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}
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// this is specific to Android, display termination is ref-counted.
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if (refs > 1) {
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// this is specific to Android, display termination is ref-counted.
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refs--;
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return EGL_TRUE;
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if (refs > 0) {
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return EGL_TRUE;
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}
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}
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EGLBoolean res = EGL_FALSE;
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egl_connection_t* const cnx = &gEGLImpl;
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if (cnx->dso && disp.state == egl_display_t::INITIALIZED) {
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if (cnx->egl.eglTerminate(disp.dpy) == EGL_FALSE) {
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ALOGW("eglTerminate(%p) failed (%s)", disp.dpy,
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egl_tls_t::egl_strerror(cnx->egl.eglGetError()));
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{
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Mutex::Autolock _l(lock);
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egl_connection_t* const cnx = &gEGLImpl;
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if (cnx->dso && disp.state == egl_display_t::INITIALIZED) {
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if (cnx->egl.eglTerminate(disp.dpy) == EGL_FALSE) {
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ALOGW("eglTerminate(%p) failed (%s)", disp.dpy,
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egl_tls_t::egl_strerror(cnx->egl.eglGetError()));
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}
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// REVISIT: it's unclear what to do if eglTerminate() fails
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disp.state = egl_display_t::TERMINATED;
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res = EGL_TRUE;
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}
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// REVISIT: it's unclear what to do if eglTerminate() fails
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disp.state = egl_display_t::TERMINATED;
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res = EGL_TRUE;
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mHibernation.setDisplayValid(false);
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// Reset the extension string since it will be regenerated if we get
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// reinitialized.
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mExtensionString.setTo("");
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// Mark all objects remaining in the list as terminated, unless
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// there are no reference to them, it which case, we're free to
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// delete them.
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size_t count = objects.size();
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ALOGW_IF(count, "eglTerminate() called w/ %d objects remaining", count);
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for (size_t i=0 ; i<count ; i++) {
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egl_object_t* o = objects.itemAt(i);
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o->destroy();
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}
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// this marks all object handles are "terminated"
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objects.clear();
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}
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mHibernation.setDisplayValid(false);
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// Reset the extension string since it will be regenerated if we get
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// reinitialized.
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mExtensionString.setTo("");
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// Mark all objects remaining in the list as terminated, unless
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// there are no reference to them, it which case, we're free to
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// delete them.
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size_t count = objects.size();
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ALOGW_IF(count, "eglTerminate() called w/ %d objects remaining", count);
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for (size_t i=0 ; i<count ; i++) {
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egl_object_t* o = objects.itemAt(i);
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o->destroy();
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{
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Mutex::Autolock _rl(refLock);
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eglIsInitialized = false;
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refCond.broadcast();
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}
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// this marks all object handles are "terminated"
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objects.clear();
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refs--;
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return res;
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}
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@ -131,7 +131,9 @@ private:
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void leave() { return mHibernation.decWakeCount(HibernationMachine::WEAK); }
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uint32_t refs;
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mutable Mutex lock;
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bool eglIsInitialized;
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mutable Mutex lock, refLock;
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mutable Condition refCond;
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SortedVector<egl_object_t*> objects;
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String8 mVendorString;
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String8 mVersionString;
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