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-rw-r--r--opengl/libs/EGL/egl_cache.cpp283
-rw-r--r--opengl/libs/EGL/egl_cache.h99
-rw-r--r--opengl/libs/EGL/egl_display.cpp1
-rw-r--r--opengl/libs/EGL/egl_display.h3
4 files changed, 365 insertions, 21 deletions
diff --git a/opengl/libs/EGL/egl_cache.cpp b/opengl/libs/EGL/egl_cache.cpp
index 1e64302..522421b 100644
--- a/opengl/libs/EGL/egl_cache.cpp
+++ b/opengl/libs/EGL/egl_cache.cpp
@@ -19,6 +19,24 @@
#include "egl_impl.h"
#include "egldefs.h"
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+// Cache size limits.
+static const size_t maxKeySize = 1024;
+static const size_t maxValueSize = 4096;
+static const size_t maxTotalSize = 64 * 1024;
+
+// Cache file header
+static const char* cacheFileMagic = "EGL$";
+static const size_t cacheFileHeaderSize = 8;
+
+// The time in seconds to wait before saving newly inserted cache entries.
+static const unsigned int deferredSaveDelay = 4;
+
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
@@ -26,37 +44,37 @@ namespace android {
#define BC_EXT_STR "EGL_ANDROID_blob_cache"
//
-// EGL_ANDROID_blob_cache types and functions
+// Callback functions passed to EGL.
//
-typedef khronos_ssize_t EGLsizei;
-
-typedef void (*EGLSetBlobFunc) (const void* key, EGLsizei keySize,
- const void* value, EGLsizei valueSize);
-
-typedef EGLsizei (*EGLGetBlobFunc) (const void* key, EGLsizei keySize,
- void* value, EGLsizei valueSize);
+static void setBlob(const void* key, EGLsizei keySize, const void* value,
+ EGLsizei valueSize) {
+ egl_cache_t::get()->setBlob(key, keySize, value, valueSize);
+}
-typedef void (EGLAPIENTRYP PFNEGLSETBLOBCACHEFUNCSPROC) (EGLDisplay dpy,
- EGLSetBlobFunc set, EGLGetBlobFunc get);
+static EGLsizei getBlob(const void* key, EGLsizei keySize, void* value,
+ EGLsizei valueSize) {
+ return egl_cache_t::get()->getBlob(key, keySize, value, valueSize);
+}
//
// egl_cache_t definition
//
-static void setBlob(const void* key, EGLsizei keySize, const void* value,
- EGLsizei valueSize) {
+egl_cache_t::egl_cache_t() :
+ mInitialized(false),
+ mBlobCache(NULL) {
}
-static EGLsizei getBlob(const void* key, EGLsizei keySize, void* value,
- EGLsizei valueSize) {
- return 0;
+egl_cache_t::~egl_cache_t() {
}
+egl_cache_t egl_cache_t::sCache;
+
egl_cache_t* egl_cache_t::get() {
- static egl_cache_t theCache;
- return &theCache;
+ return &sCache;
}
void egl_cache_t::initialize(egl_display_t *display) {
+ Mutex::Autolock lock(mMutex);
for (int i = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
egl_connection_t* const cnx = &gEGLImpl[i];
if (cnx->dso && cnx->major >= 0 && cnx->minor >= 0) {
@@ -79,7 +97,8 @@ void egl_cache_t::initialize(egl_display_t *display) {
continue;
}
- eglSetBlobCacheFuncs(display->disp[i].dpy, setBlob, getBlob);
+ eglSetBlobCacheFuncs(display->disp[i].dpy, android::setBlob,
+ android::getBlob);
EGLint err = cnx->egl.eglGetError();
if (err != EGL_SUCCESS) {
LOGE("eglSetBlobCacheFuncs resulted in an error: %#x",
@@ -88,6 +107,234 @@ void egl_cache_t::initialize(egl_display_t *display) {
}
}
}
+ mInitialized = true;
+}
+
+void egl_cache_t::terminate() {
+ Mutex::Autolock lock(mMutex);
+ if (mBlobCache != NULL) {
+ saveBlobCacheLocked();
+ mBlobCache = NULL;
+ }
+ mInitialized = false;
+}
+
+void egl_cache_t::setBlob(const void* key, EGLsizei keySize, const void* value,
+ EGLsizei valueSize) {
+ Mutex::Autolock lock(mMutex);
+
+ if (keySize < 0 || valueSize < 0) {
+ LOGW("EGL_ANDROID_blob_cache set: negative sizes are not allowed");
+ return;
+ }
+
+ if (mInitialized) {
+ sp<BlobCache> bc = getBlobCacheLocked();
+ bc->set(key, keySize, value, valueSize);
+
+ if (!mSavePending) {
+ class DeferredSaveThread : public Thread {
+ public:
+ DeferredSaveThread() : Thread(false) {}
+
+ virtual bool threadLoop() {
+ sleep(deferredSaveDelay);
+ egl_cache_t* c = egl_cache_t::get();
+ Mutex::Autolock lock(c->mMutex);
+ if (c->mInitialized) {
+ c->saveBlobCacheLocked();
+ }
+ c->mSavePending = false;
+ return false;
+ }
+ };
+
+ // The thread will hold a strong ref to itself until it has finished
+ // running, so there's no need to keep a ref around.
+ sp<Thread> deferredSaveThread(new DeferredSaveThread());
+ mSavePending = true;
+ deferredSaveThread->run();
+ }
+ }
+}
+
+EGLsizei egl_cache_t::getBlob(const void* key, EGLsizei keySize, void* value,
+ EGLsizei valueSize) {
+ Mutex::Autolock lock(mMutex);
+
+ if (keySize < 0 || valueSize < 0) {
+ LOGW("EGL_ANDROID_blob_cache set: negative sizes are not allowed");
+ return 0;
+ }
+
+ if (mInitialized) {
+ sp<BlobCache> bc = getBlobCacheLocked();
+ return bc->get(key, keySize, value, valueSize);
+ }
+ return 0;
+}
+
+void egl_cache_t::setCacheFilename(const char* filename) {
+ Mutex::Autolock lock(mMutex);
+ mFilename = filename;
+}
+
+sp<BlobCache> egl_cache_t::getBlobCacheLocked() {
+ if (mBlobCache == NULL) {
+ mBlobCache = new BlobCache(maxKeySize, maxValueSize, maxTotalSize);
+ loadBlobCacheLocked();
+ }
+ return mBlobCache;
+}
+
+static uint32_t crc32c(const uint8_t* buf, size_t len) {
+ const uint32_t polyBits = 0x82F63B78;
+ uint32_t r = 0;
+ for (size_t i = 0; i < len; i++) {
+ r ^= buf[i];
+ for (int j = 0; j < 8; j++) {
+ if (r & 1) {
+ r = (r >> 1) ^ polyBits;
+ } else {
+ r >>= 1;
+ }
+ }
+ }
+ return r;
+}
+
+void egl_cache_t::saveBlobCacheLocked() {
+ if (mFilename.length() > 0) {
+ size_t cacheSize = mBlobCache->getFlattenedSize();
+ size_t headerSize = cacheFileHeaderSize;
+ const char* fname = mFilename.string();
+
+ // Try to create the file with no permissions so we can write it
+ // without anyone trying to read it.
+ int fd = open(fname, O_CREAT | O_EXCL | O_RDWR, 0);
+ if (fd == -1) {
+ if (errno == EEXIST) {
+ // The file exists, delete it and try again.
+ if (unlink(fname) == -1) {
+ // No point in retrying if the unlink failed.
+ LOGE("error unlinking cache file %s: %s (%d)", fname,
+ strerror(errno), errno);
+ return;
+ }
+ // Retry now that we've unlinked the file.
+ fd = open(fname, O_CREAT | O_EXCL | O_RDWR, 0);
+ }
+ if (fd == -1) {
+ LOGE("error creating cache file %s: %s (%d)", fname,
+ strerror(errno), errno);
+ return;
+ }
+ }
+
+ size_t fileSize = headerSize + cacheSize;
+ if (ftruncate(fd, fileSize) == -1) {
+ LOGE("error setting cache file size: %s (%d)", strerror(errno),
+ errno);
+ close(fd);
+ unlink(fname);
+ return;
+ }
+
+ uint8_t* buf = reinterpret_cast<uint8_t*>(mmap(NULL, fileSize,
+ PROT_WRITE, MAP_SHARED, fd, 0));
+ if (buf == MAP_FAILED) {
+ LOGE("error mmaping cache file: %s (%d)", strerror(errno),
+ errno);
+ close(fd);
+ unlink(fname);
+ return;
+ }
+
+ status_t err = mBlobCache->flatten(buf + headerSize, cacheSize, NULL,
+ 0);
+ if (err != OK) {
+ LOGE("error writing cache contents: %s (%d)", strerror(-err),
+ -err);
+ munmap(buf, fileSize);
+ close(fd);
+ unlink(fname);
+ return;
+ }
+
+ // Write the file magic and CRC
+ memcpy(buf, cacheFileMagic, 4);
+ uint32_t* crc = reinterpret_cast<uint32_t*>(buf + 4);
+ *crc = crc32c(buf + headerSize, cacheSize);
+
+ munmap(buf, fileSize);
+ fchmod(fd, S_IRUSR);
+ close(fd);
+ }
+}
+
+void egl_cache_t::loadBlobCacheLocked() {
+ if (mFilename.length() > 0) {
+ size_t headerSize = cacheFileHeaderSize;
+
+ int fd = open(mFilename.string(), O_RDONLY, 0);
+ if (fd == -1) {
+ if (errno != ENOENT) {
+ LOGE("error opening cache file %s: %s (%d)", mFilename.string(),
+ strerror(errno), errno);
+ }
+ return;
+ }
+
+ struct stat statBuf;
+ if (fstat(fd, &statBuf) == -1) {
+ LOGE("error stat'ing cache file: %s (%d)", strerror(errno), errno);
+ close(fd);
+ return;
+ }
+
+ // Sanity check the size before trying to mmap it.
+ size_t fileSize = statBuf.st_size;
+ if (fileSize > maxTotalSize * 2) {
+ LOGE("cache file is too large: %#llx", statBuf.st_size);
+ close(fd);
+ return;
+ }
+
+ uint8_t* buf = reinterpret_cast<uint8_t*>(mmap(NULL, fileSize,
+ PROT_READ, MAP_PRIVATE, fd, 0));
+ if (buf == MAP_FAILED) {
+ LOGE("error mmaping cache file: %s (%d)", strerror(errno),
+ errno);
+ close(fd);
+ return;
+ }
+
+ // Check the file magic and CRC
+ size_t cacheSize = fileSize - headerSize;
+ if (memcmp(buf, cacheFileMagic, 4) != 0) {
+ LOGE("cache file has bad mojo");
+ close(fd);
+ return;
+ }
+ uint32_t* crc = reinterpret_cast<uint32_t*>(buf + 4);
+ if (crc32c(buf + headerSize, cacheSize) != *crc) {
+ LOGE("cache file failed CRC check");
+ close(fd);
+ return;
+ }
+
+ status_t err = mBlobCache->unflatten(buf + headerSize, cacheSize, NULL, 0);
+ if (err != OK) {
+ LOGE("error reading cache contents: %s (%d)", strerror(-err),
+ -err);
+ munmap(buf, fileSize);
+ close(fd);
+ return;
+ }
+
+ munmap(buf, fileSize);
+ close(fd);
+ }
}
// ----------------------------------------------------------------------------
diff --git a/opengl/libs/EGL/egl_cache.h b/opengl/libs/EGL/egl_cache.h
index 1fcfacc..4389623 100644
--- a/opengl/libs/EGL/egl_cache.h
+++ b/opengl/libs/EGL/egl_cache.h
@@ -14,20 +14,117 @@
** limitations under the License.
*/
+#ifndef ANDROID_EGL_CACHE_H
+#define ANDROID_EGL_CACHE_H
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <utils/BlobCache.h>
+#include <utils/String8.h>
+#include <utils/StrongPointer.h>
+
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
class egl_display_t;
-class egl_cache_t {
+class EGLAPI egl_cache_t {
public:
+ // get returns a pointer to the singleton egl_cache_t object. This
+ // singleton object will never be destroyed.
static egl_cache_t* get();
+ // initialize puts the egl_cache_t into an initialized state, such that it
+ // is able to insert and retrieve entries from the cache. This should be
+ // called when EGL is initialized. When not in the initialized state the
+ // getBlob and setBlob methods will return without performing any cache
+ // operations.
void initialize(egl_display_t* display);
+
+ // terminate puts the egl_cache_t back into the uninitialized state. When
+ // in this state the getBlob and setBlob methods will return without
+ // performing any cache operations.
+ void terminate();
+
+ // setBlob attempts to insert a new key/value blob pair into the cache.
+ // This will be called by the hardware vendor's EGL implementation via the
+ // EGL_ANDROID_blob_cache extension.
+ void setBlob(const void* key, EGLsizei keySize, const void* value,
+ EGLsizei valueSize);
+
+ // getBlob attempts to retrieve the value blob associated with a given key
+ // blob from cache. This will be called by the hardware vendor's EGL
+ // implementation via the EGL_ANDROID_blob_cache extension.
+ EGLsizei getBlob(const void* key, EGLsizei keySize, void* value,
+ EGLsizei valueSize);
+
+ // setCacheFilename sets the name of the file that should be used to store
+ // cache contents from one program invocation to another.
+ void setCacheFilename(const char* filename);
+
+private:
+ // Creation and (the lack of) destruction is handled internally.
+ egl_cache_t();
+ ~egl_cache_t();
+
+ // Copying is disallowed.
+ egl_cache_t(const egl_cache_t&); // not implemented
+ void operator=(const egl_cache_t&); // not implemented
+
+ // getBlobCacheLocked returns the BlobCache object being used to store the
+ // key/value blob pairs. If the BlobCache object has not yet been created,
+ // this will do so, loading the serialized cache contents from disk if
+ // possible.
+ sp<BlobCache> getBlobCacheLocked();
+
+ // saveBlobCache attempts to save the current contents of mBlobCache to
+ // disk.
+ void saveBlobCacheLocked();
+
+ // loadBlobCache attempts to load the saved cache contents from disk into
+ // mBlobCache.
+ void loadBlobCacheLocked();
+
+ // mInitialized indicates whether the egl_cache_t is in the initialized
+ // state. It is initialized to false at construction time, and gets set to
+ // true when initialize is called. It is set back to false when terminate
+ // is called. When in this state, the cache behaves as normal. When not,
+ // the getBlob and setBlob methods will return without performing any cache
+ // operations.
+ bool mInitialized;
+
+ // mBlobCache is the cache in which the key/value blob pairs are stored. It
+ // is initially NULL, and will be initialized by getBlobCacheLocked the
+ // first time it's needed.
+ sp<BlobCache> mBlobCache;
+
+ // mFilename is the name of the file for storing cache contents in between
+ // program invocations. It is initialized to an empty string at
+ // construction time, and can be set with the setCacheFilename method. An
+ // empty string indicates that the cache should not be saved to or restored
+ // from disk.
+ String8 mFilename;
+
+ // mSavePending indicates whether or not a deferred save operation is
+ // pending. Each time a key/value pair is inserted into the cache via
+ // setBlob, a deferred save is initiated if one is not already pending.
+ // This will wait some amount of time and then trigger a save of the cache
+ // contents to disk.
+ bool mSavePending;
+
+ // mMutex is the mutex used to prevent concurrent access to the member
+ // variables. It must be locked whenever the member variables are accessed.
+ mutable Mutex mMutex;
+
+ // sCache is the singleton egl_cache_t object.
+ static egl_cache_t sCache;
};
// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------
+
+#endif // ANDROID_EGL_CACHE_H
diff --git a/opengl/libs/EGL/egl_display.cpp b/opengl/libs/EGL/egl_display.cpp
index 0f92864..558ca77 100644
--- a/opengl/libs/EGL/egl_display.cpp
+++ b/opengl/libs/EGL/egl_display.cpp
@@ -44,6 +44,7 @@ egl_display_t::egl_display_t() :
egl_display_t::~egl_display_t() {
magic = 0;
+ egl_cache_t::get()->terminate();
}
egl_display_t* egl_display_t::get(EGLDisplay dpy) {
diff --git a/opengl/libs/EGL/egl_display.h b/opengl/libs/EGL/egl_display.h
index 113595f..1c1092c 100644
--- a/opengl/libs/EGL/egl_display.h
+++ b/opengl/libs/EGL/egl_display.h
@@ -59,7 +59,7 @@ struct egl_config_t {
// ----------------------------------------------------------------------------
-class egl_display_t {
+class EGLAPI egl_display_t { // marked as EGLAPI for testing purposes
static egl_display_t sDisplay[NUM_DISPLAYS];
EGLDisplay getDisplay(EGLNativeDisplayType display);
@@ -141,4 +141,3 @@ EGLBoolean validate_display_surface(EGLDisplay dpy, EGLSurface surface);
// ----------------------------------------------------------------------------
#endif // ANDROID_EGL_DISPLAY_H
-
generated by cgit v1.1 at 2025-11-13 17:54:48 +0000