diff options
Diffstat (limited to 'libgralloc/mapper.cpp')
| -rw-r--r-- | libgralloc/mapper.cpp | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/libgralloc/mapper.cpp b/libgralloc/mapper.cpp deleted file mode 100644 index 33d0958..0000000 --- a/libgralloc/mapper.cpp +++ /dev/null @@ -1,169 +0,0 @@ -/* - * Copyright (C) 2008 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 <limits.h> -#include <errno.h> -#include <pthread.h> -#include <unistd.h> -#include <string.h> - -#include <sys/mman.h> -#include <sys/stat.h> -#include <sys/types.h> - -#include <cutils/log.h> -#include <cutils/atomic.h> - -#include <hardware/hardware.h> -#include <hardware/gralloc.h> - -#include "gralloc_priv.h" - - -/* desktop Linux needs a little help with gettid() */ -#if defined(ARCH_X86) && !defined(HAVE_ANDROID_OS) -#define __KERNEL__ -# include <linux/unistd.h> -pid_t gettid() { return syscall(__NR_gettid);} -#undef __KERNEL__ -#endif - -/*****************************************************************************/ - -static int gralloc_map(gralloc_module_t const* module, - buffer_handle_t handle, - void** vaddr) -{ - private_handle_t* hnd = (private_handle_t*)handle; - if (!(hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)) { - size_t size = hnd->size; - void* mappedAddress = mmap(0, size, - PROT_READ|PROT_WRITE, MAP_SHARED, hnd->fd, 0); - if (mappedAddress == MAP_FAILED) { - LOGE("Could not mmap %s", strerror(errno)); - return -errno; - } - hnd->base = intptr_t(mappedAddress) + hnd->offset; - //LOGD("gralloc_map() succeeded fd=%d, off=%d, size=%d, vaddr=%p", - // hnd->fd, hnd->offset, hnd->size, mappedAddress); - } - *vaddr = (void*)hnd->base; - return 0; -} - -static int gralloc_unmap(gralloc_module_t const* module, - buffer_handle_t handle) -{ - private_handle_t* hnd = (private_handle_t*)handle; - if (!(hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)) { - void* base = (void*)hnd->base; - size_t size = hnd->size; - //LOGD("unmapping from %p, size=%d", base, size); - if (munmap(base, size) < 0) { - LOGE("Could not unmap %s", strerror(errno)); - } - } - hnd->base = 0; - return 0; -} - -/*****************************************************************************/ - -static pthread_mutex_t sMapLock = PTHREAD_MUTEX_INITIALIZER; - -/*****************************************************************************/ - -int gralloc_register_buffer(gralloc_module_t const* module, - buffer_handle_t handle) -{ - if (private_handle_t::validate(handle) < 0) - return -EINVAL; - - // if this handle was created in this process, then we keep it as is. - int err = 0; - private_handle_t* hnd = (private_handle_t*)handle; - if (hnd->pid != getpid()) { - void *vaddr; - err = gralloc_map(module, handle, &vaddr); - } - return err; -} - -int gralloc_unregister_buffer(gralloc_module_t const* module, - buffer_handle_t handle) -{ - if (private_handle_t::validate(handle) < 0) - return -EINVAL; - - // never unmap buffers that were created in this process - private_handle_t* hnd = (private_handle_t*)handle; - if (hnd->pid != getpid()) { - if (hnd->base) { - gralloc_unmap(module, handle); - } - } - return 0; -} - -int mapBuffer(gralloc_module_t const* module, - private_handle_t* hnd) -{ - void* vaddr; - return gralloc_map(module, hnd, &vaddr); -} - -int terminateBuffer(gralloc_module_t const* module, - private_handle_t* hnd) -{ - if (hnd->base) { - // this buffer was mapped, unmap it now - gralloc_unmap(module, hnd); - } - - return 0; -} - -int gralloc_lock(gralloc_module_t const* module, - buffer_handle_t handle, int usage, - int l, int t, int w, int h, - void** vaddr) -{ - // this is called when a buffer is being locked for software - // access. in thin implementation we have nothing to do since - // not synchronization with the h/w is needed. - // typically this is used to wait for the h/w to finish with - // this buffer if relevant. the data cache may need to be - // flushed or invalidated depending on the usage bits and the - // hardware. - - if (private_handle_t::validate(handle) < 0) - return -EINVAL; - - private_handle_t* hnd = (private_handle_t*)handle; - *vaddr = (void*)hnd->base; - return 0; -} - -int gralloc_unlock(gralloc_module_t const* module, - buffer_handle_t handle) -{ - // we're done with a software buffer. nothing to do in this - // implementation. typically this is used to flush the data cache. - - if (private_handle_t::validate(handle) < 0) - return -EINVAL; - return 0; -} |