1 /* 2 * Copyright (C) 2007 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 #define LOG_TAG "NativeHandle" 18 19 #include <stdint.h> 20 #include <errno.h> 21 #include <string.h> 22 #include <stdlib.h> 23 #include <unistd.h> 24 25 #include <cutils/log.h> 26 #include <cutils/native_handle.h> 27 28 static const int kMaxNativeFds = 1024; 29 static const int kMaxNativeInts = 1024; 30 31 native_handle_t* native_handle_create(int numFds, int numInts) 32 { 33 if (numFds < 0 || numInts < 0 || numFds > kMaxNativeFds || numInts > kMaxNativeInts) { 34 return NULL; 35 } 36 37 size_t mallocSize = sizeof(native_handle_t) + (sizeof(int) * (numFds + numInts)); 38 native_handle_t* h = malloc(mallocSize); 39 if (h) { 40 h->version = sizeof(native_handle_t); 41 h->numFds = numFds; 42 h->numInts = numInts; 43 } 44 return h; 45 } 46 47 int native_handle_delete(native_handle_t* h) 48 { 49 if (h) { 50 if (h->version != sizeof(native_handle_t)) 51 return -EINVAL; 52 free(h); 53 } 54 return 0; 55 } 56 57 int native_handle_close(const native_handle_t* h) 58 { 59 if (h->version != sizeof(native_handle_t)) 60 return -EINVAL; 61 62 const int numFds = h->numFds; 63 int i; 64 for (i=0 ; i<numFds ; i++) { 65 close(h->data[i]); 66 } 67 return 0; 68 } 69
