1 /* 2 * Copyright (C) 2009 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 NATIVE_HANDLE_H_ 18 #define NATIVE_HANDLE_H_ 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 typedef struct native_handle 25 { 26 int version; /* sizeof(native_handle_t) */ 27 int numFds; /* number of file-descriptors at &data[0] */ 28 int numInts; /* number of ints at &data[numFds] */ 29 int data[0]; /* numFds + numInts ints */ 30 } native_handle_t; 31 32 /* 33 * native_handle_close 34 * 35 * closes the file descriptors contained in this native_handle_t 36 * 37 * return 0 on success, or a negative error code on failure 38 * 39 */ 40 int native_handle_close(const native_handle_t* h); 41 42 43 /* 44 * native_handle_create 45 * 46 * creates a native_handle_t and initializes it. must be destroyed with 47 * native_handle_delete(). 48 * 49 */ 50 native_handle_t* native_handle_create(int numFds, int numInts); 51 52 /* 53 * native_handle_delete 54 * 55 * frees a native_handle_t allocated with native_handle_create(). 56 * This ONLY frees the memory allocated for the native_handle_t, but doesn't 57 * close the file descriptors; which can be achieved with native_handle_close(). 58 * 59 * return 0 on success, or a negative error code on failure 60 * 61 */ 62 int native_handle_delete(native_handle_t* h); 63 64 65 #ifdef __cplusplus 66 } 67 #endif 68 69 #endif /* NATIVE_HANDLE_H_ */ 70