| 1094 | */ |
| 1095 | |
| 1096 | static SLONG pread(int fd, SCHAR* buf, SLONG nbytes, SLONG offset) |
| 1097 | /************************************** |
| 1098 | * |
| 1099 | * p r e a d |
| 1100 | * |
| 1101 | ************************************** |
| 1102 | * |
| 1103 | * Functional description |
| 1104 | * |
| 1105 | * This function uses Asynchronous I/O calls to implement |
| 1106 | * positioned read from a given offset |
| 1107 | **************************************/ |
| 1108 | { |
| 1109 | struct aiocb io; |
| 1110 | io.aio_fildes = fd; |
| 1111 | io.aio_offset = offset; |
| 1112 | io.aio_buf = buf; |
| 1113 | io.aio_nbytes = nbytes; |
| 1114 | io.aio_reqprio = 0; |
| 1115 | io.aio_sigevent.sigev_notify = SIGEV_NONE; |
| 1116 | int err = aio_read(&io); // atomically reads at offset |
| 1117 | if (err != 0) |
| 1118 | return (err); // errno is set |
| 1119 | |
| 1120 | struct aiocb *list[1]; |
| 1121 | list[0] = &io; |
| 1122 | err = aio_suspend(list, 1, NULL); // wait for I/O to complete |
| 1123 | if (err != 0) |
| 1124 | return (err); // errno is set |
| 1125 | return (aio_return(&io)); // return I/O status |
| 1126 | } |
| 1127 | |
| 1128 | static SLONG pwrite(int fd, SCHAR* buf, SLONG nbytes, SLONG offset) |
| 1129 | /************************************** |
no outgoing calls
no test coverage detected