diff options
author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:48 -0800 |
---|---|---|
committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:48 -0800 |
commit | d51f49a11dad52e172e4d7f6fcdf571f24efbcd5 (patch) | |
tree | 4b825dc642cb6eb9a060e54bf8d69288fbee4904 /hardware.c | |
parent | b5d75924d7a17452b157dc12de31d254f8af1831 (diff) | |
download | hardware_libhardware-d51f49a11dad52e172e4d7f6fcdf571f24efbcd5.tar.gz hardware_libhardware-d51f49a11dad52e172e4d7f6fcdf571f24efbcd5.tar.bz2 hardware_libhardware-d51f49a11dad52e172e4d7f6fcdf571f24efbcd5.zip |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'hardware.c')
-rw-r--r-- | hardware.c | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/hardware.c b/hardware.c deleted file mode 100644 index 86bce24..0000000 --- a/hardware.c +++ /dev/null @@ -1,167 +0,0 @@ -/* - * Copyright (C) 2008 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. - */ - -#include <hardware/hardware.h> - -#include <cutils/properties.h> - -#include <dlfcn.h> -#include <string.h> -#include <pthread.h> -#include <errno.h> -#include <limits.h> - -#define LOG_TAG "HAL" -#include <utils/Log.h> - -/** Base path of the hal modules */ -#define HAL_LIBRARY_PATH "/system/lib/hw" - -/** - * There are a set of variant filename for modules. The form of the filename - * is "<MODULE_ID>.variant.so" so for the led module the Dream variants - * of base "ro.product.board", "ro.board.platform" and "ro.arch" would be: - * - * led.trout.so - * led.msm7k.so - * led.ARMV6.so - * led.default.so - */ - -#define HAL_DEFAULT_VARIANT "default" -#define HAL_VARIANT_KEYS_COUNT 4 -static const char *variant_keys[HAL_VARIANT_KEYS_COUNT] = { - "ro.product.board", - "ro.board.platform", - "ro.arch", - HAL_DEFAULT_VARIANT -}; - -/** - * Load the file defined by the path and if succesfull - * return the dlopen handle and the hmi. - * @return 0 = success, !0 = failure. - */ -static int load(const char *id, - const char *path, - void **pHandle, - const struct hw_module_t **pHmi) -{ - int status; - void *handle; - const struct hw_module_t *hmi; - - LOGV("load: E id=%s path=%s", id, path); - - /* - * load the symbols resolving undefined symbols before - * dlopen returns. Since RTLD_GLOBAL is not or'd in with - * RTLD_NOW the external symbols will not be global - */ - handle = dlopen(path, RTLD_NOW); - if (handle == NULL) { - char const *err_str = dlerror(); - LOGW("load: module=%s error=%s", path, err_str); - status = -EINVAL; - goto done; - } - - /* Get the address of the struct hal_module_info. */ - const char *sym = HAL_MODULE_INFO_SYM_AS_STR; - hmi = (const struct hw_module_t *)dlsym(handle, sym); - if (hmi == NULL) { - char const *err_str = dlerror(); - LOGE("load: couldn't find symbol %s", sym); - status = -EINVAL; - goto done; - } - - /* Check that the id matches */ - if (strcmp(id, hmi->id) != 0) { - LOGE("load: id=%s != hmi->id=%s", id, hmi->id); - status = -EINVAL; - goto done; - } - - /* success */ - status = 0; - -done: - if (status != 0) { - hmi = NULL; - if (handle != NULL) { - dlclose(handle); - handle = NULL; - } - } - - *pHmi = hmi; - *pHandle = handle; - - LOGV("load: X id=%s path=%s hmi=%p pHandle=%p status=%d", - id, path, *pHmi, *pHandle, status); - return status; -} - -int hw_get_module(const char *id, const struct hw_module_t **module) -{ - int status; - const struct hw_module_t *hmi = NULL; - char path[PATH_MAX]; - char variant[PATH_MAX]; - void *handle = NULL; - int i; - - /* - * Here we rely on the fact that calling dlopen multiple times on - * the same .so will simply increment a refcount (and not load - * a new copy of the library). - * We also assume that dlopen() is thread-safe. - */ - - LOGV("hal_module_info_get: Load module id=%s", id); - - /* Loop through the configuration variants looking for a module */ - status = -EINVAL; - for (i = 0; (status != 0) && (i < HAL_VARIANT_KEYS_COUNT); i++) { - - /* Get variant or default */ - if (strcmp(variant_keys[i], HAL_DEFAULT_VARIANT) == 0) { - strncpy(variant, HAL_DEFAULT_VARIANT, sizeof(variant)-1); - variant[sizeof(variant)-1] = 0; - } else { - if (property_get(variant_keys[i], variant, NULL) == 0) { - continue; - } - } - - /* Construct the path then try to load */ - snprintf(path, sizeof(path), "%s/%s.%s.so", - HAL_LIBRARY_PATH, id, variant); - status = load(id, path, &handle, &hmi); - } - if (status != 0) { - hmi = NULL; - if (handle != NULL) { - dlclose(handle); - } - } - - *module = hmi; - LOGV("hal_module_info_get: X id=%s hmi=%p status=%d", id, hmi, status); - - return status; -} |