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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef GR_H_
     18 #define GR_H_
     19 
     20 #include <stdint.h>
     21 #ifdef HAVE_ANDROID_OS      // just want PAGE_SIZE define
     22 # include <asm/page.h>
     23 #else
     24 # include <sys/user.h>
     25 #endif
     26 #include <limits.h>
     27 #include <sys/cdefs.h>
     28 #include <hardware/gralloc.h>
     29 #include <pthread.h>
     30 #include <errno.h>
     31 
     32 #include <cutils/native_handle.h>
     33 
     34 /*****************************************************************************/
     35 
     36 struct private_module_t;
     37 struct private_handle_t;
     38 
     39 inline size_t roundUpToPageSize(size_t x) {
     40     return (x + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
     41 }
     42 
     43 int mapFrameBufferLocked(struct private_module_t* module);
     44 int terminateBuffer(gralloc_module_t const* module, private_handle_t* hnd);
     45 int mapBuffer(gralloc_module_t const* module, private_handle_t* hnd);
     46 
     47 /*****************************************************************************/
     48 
     49 class Locker {
     50     pthread_mutex_t mutex;
     51 public:
     52     class Autolock {
     53         Locker& locker;
     54     public:
     55         inline Autolock(Locker& locker) : locker(locker) {  locker.lock(); }
     56         inline ~Autolock() { locker.unlock(); }
     57     };
     58     inline Locker()        { pthread_mutex_init(&mutex, 0); }
     59     inline ~Locker()       { pthread_mutex_destroy(&mutex); }
     60     inline void lock()     { pthread_mutex_lock(&mutex); }
     61     inline void unlock()   { pthread_mutex_unlock(&mutex); }
     62 };
     63 
     64 #endif /* GR_H_ */
     65