f5811ba2df
private_handle_t's memory layout must be consistent between the 32-bit and 64-bit gralloc, in case buffers are passed between processes. Replace the (variably sized) uintptr_t base with a fixed size uint64_t, and enforce 8-byte alignment for architectures where uint64_t alignment varies between 32-bit and 64-bit. Change-Id: I06cb31d4b9620ea18e5b50d3a3142b5adb2d2a14 Signed-off-by: Greg Hackmann <ghackmann@google.com>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef GRALLOC_PRIV_H_
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#define GRALLOC_PRIV_H_
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#include <stdint.h>
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#include <limits.h>
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#include <sys/cdefs.h>
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#include <hardware/gralloc.h>
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#include <pthread.h>
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#include <errno.h>
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#include <unistd.h>
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#include <cutils/native_handle.h>
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#include <linux/fb.h>
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/*****************************************************************************/
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struct private_module_t;
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struct private_handle_t;
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struct private_module_t {
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gralloc_module_t base;
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private_handle_t* framebuffer;
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uint32_t flags;
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uint32_t numBuffers;
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uint32_t bufferMask;
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pthread_mutex_t lock;
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buffer_handle_t currentBuffer;
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int pmem_master;
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void* pmem_master_base;
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struct fb_var_screeninfo info;
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struct fb_fix_screeninfo finfo;
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float xdpi;
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float ydpi;
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float fps;
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};
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/*****************************************************************************/
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#ifdef __cplusplus
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struct private_handle_t : public native_handle {
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#else
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struct private_handle_t {
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struct native_handle nativeHandle;
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#endif
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enum {
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PRIV_FLAGS_FRAMEBUFFER = 0x00000001
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};
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// file-descriptors
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int fd;
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// ints
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int magic;
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int flags;
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int size;
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int offset;
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// FIXME: the attributes below should be out-of-line
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uint64_t base __attribute__((aligned(8)));
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int pid;
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#ifdef __cplusplus
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static inline int sNumInts() {
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return (((sizeof(private_handle_t) - sizeof(native_handle_t))/sizeof(int)) - sNumFds);
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}
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static const int sNumFds = 1;
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static const int sMagic = 0x3141592;
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private_handle_t(int fd, int size, int flags) :
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fd(fd), magic(sMagic), flags(flags), size(size), offset(0),
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base(0), pid(getpid())
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{
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version = sizeof(native_handle);
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numInts = sNumInts();
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numFds = sNumFds;
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}
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~private_handle_t() {
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magic = 0;
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}
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static int validate(const native_handle* h) {
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const private_handle_t* hnd = (const private_handle_t*)h;
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if (!h || h->version != sizeof(native_handle) ||
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h->numInts != sNumInts() || h->numFds != sNumFds ||
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hnd->magic != sMagic)
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{
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ALOGE("invalid gralloc handle (at %p)", h);
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return -EINVAL;
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}
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return 0;
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}
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#endif
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};
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#endif /* GRALLOC_PRIV_H_ */
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