| /* |
| * Copyright (C) 2011 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 ANDROID_INCLUDE_HARDWARE_QEMU_PIPE_H |
| #define ANDROID_INCLUDE_HARDWARE_QEMU_PIPE_H |
| |
| #include <sys/cdefs.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <sys/mman.h> |
| #include <pthread.h> /* for pthread_once() */ |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <errno.h> |
| |
| #ifndef D |
| # define D(...) do{}while(0) |
| #endif |
| |
| /* Try to open a new Qemu fast-pipe. This function returns a file descriptor |
| * that can be used to communicate with a named service managed by the |
| * emulator. |
| * |
| * This file descriptor can be used as a standard pipe/socket descriptor. |
| * |
| * 'pipeName' is the name of the emulator service you want to connect to. |
| * E.g. 'opengles' or 'camera'. |
| * |
| * On success, return a valid file descriptor |
| * Returns -1 on error, and errno gives the error code, e.g.: |
| * |
| * EINVAL -> unknown/unsupported pipeName |
| * ENOSYS -> fast pipes not available in this system. |
| * |
| * ENOSYS should never happen, except if you're trying to run within a |
| * misconfigured emulator. |
| * |
| * You should be able to open several pipes to the same pipe service, |
| * except for a few special cases (e.g. GSM modem), where EBUSY will be |
| * returned if more than one client tries to connect to it. |
| */ |
| static __inline__ int |
| qemu_pipe_open(const char* pipeName) |
| { |
| char buff[256]; |
| int buffLen; |
| int fd, ret; |
| |
| if (pipeName == NULL || pipeName[0] == '\0') { |
| errno = EINVAL; |
| return -1; |
| } |
| |
| snprintf(buff, sizeof buff, "pipe:%s", pipeName); |
| |
| fd = open("/dev/qemu_pipe", O_RDWR); |
| if (fd < 0) { |
| D("%s: Could not open /dev/qemu_pipe: %s", __FUNCTION__, strerror(errno)); |
| //errno = ENOSYS; |
| return -1; |
| } |
| |
| buffLen = strlen(buff); |
| |
| ret = TEMP_FAILURE_RETRY(write(fd, buff, buffLen+1)); |
| if (ret != buffLen+1) { |
| D("%s: Could not connect to %s pipe service: %s", __FUNCTION__, pipeName, strerror(errno)); |
| if (ret == 0) { |
| errno = ECONNRESET; |
| } else if (ret > 0) { |
| errno = EINVAL; |
| } |
| return -1; |
| } |
| |
| return fd; |
| } |
| |
| #endif /* ANDROID_INCLUDE_HARDWARE_QEMUD_PIPE_H */ |