initial GL libraries for msm8960
Change-Id: I16451c70a079894ac326d3564d96f1fbafcd4f1b
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/libgenlock/genlock.cpp b/libgenlock/genlock.cpp
new file mode 100644
index 0000000..5d5536b
--- /dev/null
+++ b/libgenlock/genlock.cpp
@@ -0,0 +1,329 @@
+/*
+ * 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 Forum, Inc. 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 "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.
+ */
+
+#include <cutils/log.h>
+#include <cutils/native_handle.h>
+#include <gralloc_priv.h>
+#include <linux/genlock.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#include "genlock.h"
+
+#define GENLOCK_DEVICE "/dev/genlock"
+
+#ifndef USE_GENLOCK
+#define USE_GENLOCK
+#endif
+
+namespace {
+ /* Internal function to map the userspace locks to the kernel lock types */
+ int get_kernel_lock_type(genlock_lock_type lockType)
+ {
+ int kLockType = 0;
+ // If the user sets both a read and write lock, higher preference is
+ // given to the write lock.
+ if (lockType & GENLOCK_WRITE_LOCK) {
+ kLockType = GENLOCK_WRLOCK;
+ } else if (lockType & GENLOCK_READ_LOCK) {
+ kLockType = GENLOCK_RDLOCK;
+ } else {
+ ALOGE("%s: invalid lockType (lockType = %d)", __FUNCTION__, lockType);
+ return -1;
+ }
+ return kLockType;
+ }
+
+ /* Internal function to perform the actual lock/unlock operations */
+ genlock_status_t perform_lock_unlock_operation(native_handle_t *buffer_handle,
+ int lockType, int timeout)
+ {
+ if (private_handle_t::validate(buffer_handle)) {
+ ALOGE("%s: handle is invalid", __FUNCTION__);
+ return GENLOCK_FAILURE;
+ }
+
+ private_handle_t *hnd = reinterpret_cast<private_handle_t*>(buffer_handle);
+ if ((hnd->flags & private_handle_t::PRIV_FLAGS_UNSYNCHRONIZED) == 0) {
+ if (hnd->genlockPrivFd < 0) {
+ ALOGE("%s: the lock has not been created, or has not been attached",
+ __FUNCTION__);
+ return GENLOCK_FAILURE;
+ }
+
+ genlock_lock lock;
+ lock.op = lockType;
+ lock.flags = 0;
+ lock.timeout = timeout;
+ lock.fd = hnd->genlockHandle;
+
+ if (ioctl(hnd->genlockPrivFd, GENLOCK_IOC_LOCK, &lock)) {
+ ALOGE("%s: GENLOCK_IOC_LOCK failed (lockType0x%x, err=%s fd=%d)", __FUNCTION__,
+ lockType, strerror(errno), hnd->fd);
+ if (ETIMEDOUT == errno)
+ return GENLOCK_TIMEDOUT;
+
+ return GENLOCK_FAILURE;
+ }
+ }
+ return GENLOCK_NO_ERROR;
+ }
+
+ /* Internal function to close the fd and release the handle */
+ void close_genlock_fd_and_handle(int& fd, int& handle)
+ {
+ if (fd >=0 ) {
+ close(fd);
+ fd = -1;
+ }
+
+ if (handle >= 0) {
+ close(handle);
+ handle = -1;
+ }
+ }
+
+}
+/*
+ * Create a genlock lock. The genlock lock file descriptor and the lock
+ * handle are stored in the buffer_handle.
+ *
+ * @param: handle of the buffer
+ * @return error status.
+ */
+genlock_status_t genlock_create_lock(native_handle_t *buffer_handle)
+{
+ genlock_status_t ret = GENLOCK_NO_ERROR;
+ if (private_handle_t::validate(buffer_handle)) {
+ ALOGE("%s: handle is invalid", __FUNCTION__);
+ return GENLOCK_FAILURE;
+ }
+
+ private_handle_t *hnd = reinterpret_cast<private_handle_t*>(buffer_handle);
+#ifdef USE_GENLOCK
+ if ((hnd->flags & private_handle_t::PRIV_FLAGS_UNSYNCHRONIZED) == 0) {
+ // Open the genlock device
+ int fd = open(GENLOCK_DEVICE, O_RDWR);
+ if (fd < 0) {
+ ALOGE("%s: open genlock device failed (err=%s)", __FUNCTION__,
+ strerror(errno));
+ return GENLOCK_FAILURE;
+ }
+
+ // Create a new lock
+ genlock_lock lock;
+ if (ioctl(fd, GENLOCK_IOC_NEW, NULL)) {
+ ALOGE("%s: GENLOCK_IOC_NEW failed (error=%s)", __FUNCTION__,
+ strerror(errno));
+ close_genlock_fd_and_handle(fd, lock.fd);
+ ret = GENLOCK_FAILURE;
+ }
+
+ // Export the lock for other processes to be able to use it.
+ if (GENLOCK_FAILURE != ret) {
+ if (ioctl(fd, GENLOCK_IOC_EXPORT, &lock)) {
+ ALOGE("%s: GENLOCK_IOC_EXPORT failed (error=%s)", __FUNCTION__,
+ strerror(errno));
+ close_genlock_fd_and_handle(fd, lock.fd);
+ ret = GENLOCK_FAILURE;
+ }
+ }
+
+ // Store the lock params in the handle.
+ hnd->genlockPrivFd = fd;
+ hnd->genlockHandle = lock.fd;
+ } else {
+ hnd->genlockHandle = 0;
+ }
+#else
+ hnd->genlockHandle = 0;
+#endif
+ return ret;
+}
+
+
+/*
+ * Release a genlock lock associated with the handle.
+ *
+ * @param: handle of the buffer
+ * @return error status.
+ */
+genlock_status_t genlock_release_lock(native_handle_t *buffer_handle)
+{
+ genlock_status_t ret = GENLOCK_NO_ERROR;
+#ifdef USE_GENLOCK
+ if (private_handle_t::validate(buffer_handle)) {
+ ALOGE("%s: handle is invalid", __FUNCTION__);
+ return GENLOCK_FAILURE;
+ }
+
+ private_handle_t *hnd = reinterpret_cast<private_handle_t*>(buffer_handle);
+ if ((hnd->flags & private_handle_t::PRIV_FLAGS_UNSYNCHRONIZED) == 0) {
+ if (hnd->genlockPrivFd < 0) {
+ ALOGE("%s: the lock is invalid", __FUNCTION__);
+ return GENLOCK_FAILURE;
+ }
+
+ // Close the fd and reset the parameters.
+ close_genlock_fd_and_handle(hnd->genlockPrivFd, hnd->genlockHandle);
+ }
+#endif
+ return ret;
+}
+
+
+/*
+ * Attach a lock to the buffer handle passed via an IPC.
+ *
+ * @param: handle of the buffer
+ * @return error status.
+ */
+genlock_status_t genlock_attach_lock(native_handle_t *buffer_handle)
+{
+ genlock_status_t ret = GENLOCK_NO_ERROR;
+#ifdef USE_GENLOCK
+ if (private_handle_t::validate(buffer_handle)) {
+ ALOGE("%s: handle is invalid", __FUNCTION__);
+ return GENLOCK_FAILURE;
+ }
+
+ private_handle_t *hnd = reinterpret_cast<private_handle_t*>(buffer_handle);
+ if ((hnd->flags & private_handle_t::PRIV_FLAGS_UNSYNCHRONIZED) == 0) {
+ // Open the genlock device
+ int fd = open(GENLOCK_DEVICE, O_RDWR);
+ if (fd < 0) {
+ ALOGE("%s: open genlock device failed (err=%s)", __FUNCTION__,
+ strerror(errno));
+ return GENLOCK_FAILURE;
+ }
+
+ // Attach the local handle to an existing lock
+ genlock_lock lock;
+ lock.fd = hnd->genlockHandle;
+ if (ioctl(fd, GENLOCK_IOC_ATTACH, &lock)) {
+ ALOGE("%s: GENLOCK_IOC_ATTACH failed (err=%s)", __FUNCTION__,
+ strerror(errno));
+ close_genlock_fd_and_handle(fd, lock.fd);
+ ret = GENLOCK_FAILURE;
+ }
+
+ // Store the relavant information in the handle
+ hnd->genlockPrivFd = fd;
+ }
+#endif
+ return ret;
+}
+
+/*
+ * Lock the buffer specified by the buffer handle. The lock held by the buffer
+ * is specified by the lockType. This function will block if a write lock is
+ * requested on the buffer which has previously been locked for a read or write
+ * operation. A buffer can be locked by multiple clients for read. An optional
+ * timeout value can be specified. By default, there is no timeout.
+ *
+ * @param: handle of the buffer
+ * @param: type of lock to be acquired by the buffer.
+ * @param: timeout value in ms. GENLOCK_MAX_TIMEOUT is the maximum timeout value.
+ * @return error status.
+ */
+genlock_status_t genlock_lock_buffer(native_handle_t *buffer_handle,
+ genlock_lock_type_t lockType,
+ int timeout)
+{
+ genlock_status_t ret = GENLOCK_NO_ERROR;
+#ifdef USE_GENLOCK
+ // Translate the locktype
+ int kLockType = get_kernel_lock_type(lockType);
+ if (-1 == kLockType) {
+ ALOGE("%s: invalid lockType", __FUNCTION__);
+ return GENLOCK_FAILURE;
+ }
+
+ if (0 == timeout) {
+ ALOGW("%s: trying to lock a buffer with timeout = 0", __FUNCTION__);
+ }
+ // Call the private function to perform the lock operation specified.
+ ret = perform_lock_unlock_operation(buffer_handle, kLockType, timeout);
+#endif
+ return ret;
+}
+
+
+/*
+ * Unlocks a buffer that has previously been locked by the client.
+ *
+ * @param: handle of the buffer to be unlocked.
+ * @return: error status.
+*/
+genlock_status_t genlock_unlock_buffer(native_handle_t *buffer_handle)
+{
+ genlock_status_t ret = GENLOCK_NO_ERROR;
+#ifdef USE_GENLOCK
+ // Do the unlock operation by setting the unlock flag. Timeout is always
+ // 0 in this case.
+ ret = perform_lock_unlock_operation(buffer_handle, GENLOCK_UNLOCK, 0);
+#endif
+ return ret;
+}
+
+/*
+ * Blocks the calling process until the lock held on the handle is unlocked.
+ *
+ * @param: handle of the buffer
+ * @param: timeout value for the wait.
+ * return: error status.
+ */
+genlock_status_t genlock_wait(native_handle_t *buffer_handle, int timeout) {
+#ifdef USE_GENLOCK
+ if (private_handle_t::validate(buffer_handle)) {
+ ALOGE("%s: handle is invalid", __FUNCTION__);
+ return GENLOCK_FAILURE;
+ }
+
+ private_handle_t *hnd = reinterpret_cast<private_handle_t*>(buffer_handle);
+ if ((hnd->flags & private_handle_t::PRIV_FLAGS_UNSYNCHRONIZED) == 0) {
+ if (hnd->genlockPrivFd < 0) {
+ ALOGE("%s: the lock is invalid", __FUNCTION__);
+ return GENLOCK_FAILURE;
+ }
+
+ if (0 == timeout)
+ ALOGW("%s: timeout = 0", __FUNCTION__);
+
+ genlock_lock lock;
+ lock.fd = hnd->genlockHandle;
+ lock.timeout = timeout;
+ if (ioctl(hnd->genlockPrivFd, GENLOCK_IOC_WAIT, &lock)) {
+ ALOGE("%s: GENLOCK_IOC_WAIT failed (err=%s)", __FUNCTION__, strerror(errno));
+ return GENLOCK_FAILURE;
+ }
+ }
+#endif
+ return GENLOCK_NO_ERROR;
+}