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/*
* 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.
*/
#ifndef GRALLOC_PRIV_H_
#define GRALLOC_PRIV_H_
#include <stdint.h>
#ifdef HAVE_ANDROID_OS // just want PAGE_SIZE define
# include <asm/page.h>
#else
# include <sys/user.h>
#endif
#include <limits.h>
#include <sys/cdefs.h>
#include <hardware/gralloc.h>
#include <pthread.h>
#include <errno.h>
#include <unistd.h>
#include <cutils/native_handle.h>
#include <linux/fb.h>
/*****************************************************************************/
struct private_module_t;
inline size_t roundUpToPageSize(size_t x) {
return (x + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
}
int mapFrameBufferLocked(struct private_module_t* module);
/*****************************************************************************/
class Locker {
pthread_mutex_t mutex;
public:
class Autolock {
Locker& locker;
public:
inline Autolock(Locker& locker) : locker(locker) { locker.lock(); }
inline ~Autolock() { locker.unlock(); }
};
inline Locker() { pthread_mutex_init(&mutex, 0); }
inline ~Locker() { pthread_mutex_destroy(&mutex); }
inline void lock() { pthread_mutex_lock(&mutex); }
inline void unlock() { pthread_mutex_unlock(&mutex); }
};
/*****************************************************************************/
struct private_handle_t;
struct private_module_t {
gralloc_module_t base;
private_handle_t* framebuffer;
uint32_t flags;
uint32_t numBuffers;
uint32_t bufferMask;
pthread_mutex_t lock;
buffer_handle_t currentBuffer;
int pmem_master;
void* pmem_master_base;
struct fb_var_screeninfo info;
struct fb_fix_screeninfo finfo;
float xdpi;
float ydpi;
float fps;
enum {
// flag to indicate we'll post this buffer
PRIV_USAGE_LOCKED_FOR_POST = 0x80000000
};
};
/*****************************************************************************/
struct private_handle_t : public native_handle
{
enum {
PRIV_FLAGS_FRAMEBUFFER = 0x00000001,
PRIV_FLAGS_USES_PMEM = 0x00000002,
};
enum {
LOCK_STATE_WRITE = 1<<31,
LOCK_STATE_MAPPED = 1<<30,
LOCK_STATE_READ_MASK = 0x3FFFFFFF
};
int fd;
int magic;
int flags;
int size;
int offset;
// FIXME: the attributes below should be out-of-line
int base;
int lockState;
int writeOwner;
int pid;
static const int sNumInts = 8;
static const int sNumFds = 1;
static const int sMagic = 0x3141592;
private_handle_t(int fd, int size, int flags) :
fd(fd), magic(sMagic), flags(flags), size(size), offset(0),
base(0), lockState(0), writeOwner(0), pid(getpid())
{
version = sizeof(native_handle);
numInts = sNumInts;
numFds = sNumFds;
}
~private_handle_t() {
magic = 0;
}
bool usesPhysicallyContiguousMemory() {
return (flags & PRIV_FLAGS_USES_PMEM) != 0;
}
static int validate(const native_handle* h) {
if (!h || h->version != sizeof(native_handle) ||
h->numInts!=sNumInts || h->numFds!=sNumFds) {
return -EINVAL;
}
const private_handle_t* hnd = (const private_handle_t*)h;
if (hnd->magic != sMagic)
return -EINVAL;
return 0;
}
static private_handle_t* dynamicCast(const native_handle* in) {
if (validate(in) == 0) {
return (private_handle_t*) in;
}
return NULL;
}
};
#endif /* GRALLOC_PRIV_H_ */
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