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Viewing changes to src/ubuntu/hybris/bridge.h

  • Committer: Tarmac
  • Author(s): Martin Pitt
  • Date: 2014-01-09 14:43:13 UTC
  • mfrom: (175.2.32 test-backend)
  • Revision ID: tarmac-20140109144313-csok7dl9bm5ys8aj
Add backend for simulated sensor data.

Approved by Ricardo Mendoza, PS Jenkins bot, Thomas Voß.

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src/ubuntu/hybris/bridge.h
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#include <assert.h>
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#include <dlfcn.h>
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#include <stddef.h>
 
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#include <stdlib.h>
 
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#include <string.h>
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#define HIDDEN_SYMBOL __attribute__ ((visibility ("hidden")))
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namespace internal
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{
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/* By default we load the backend from /system/lib/libubuntu_application_api.so
 
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 * Programs can select a different backend with $UBUNTU_PLATFORM_API_BACKEND,
 
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 * which either needs to be a full path or just the file name (then it will be
 
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 * looked up in the usual library search path, see dlopen(3)).
 
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 */
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struct HIDDEN_SYMBOL ToApplication
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{
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    static const char* path()
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    {
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        return "/system/lib/libubuntu_application_api.so";
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    }
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};
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struct HIDDEN_SYMBOL ToHardware
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{
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    static const char* path()
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    {
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        return "/system/lib/libubuntu_platform_hardware_api.so";
 
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        static const char* cache = NULL;
 
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        if (cache == NULL) {
 
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            cache = secure_getenv("UBUNTU_PLATFORM_API_BACKEND");
 
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            if (cache == NULL)
 
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                cache = "/system/lib/libubuntu_application_api.so";
 
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        }
 
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        return cache;
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    }
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};
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    void* resolve_symbol(const char* symbol) const
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    {
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        return android_dlsym(lib_handle, symbol);
 
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        return dlsym_fn(lib_handle, symbol);
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    }
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  protected:
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    Bridge() : lib_handle(android_dlopen(Scope::path(), RTLD_LAZY))
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    {
 
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        const char* path = Scope::path();
 
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        /* use Android dl functions for Android libs in /system/, glibc dl
 
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         * functions for others */
 
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        if (strncmp(path, "/system/", 8) == 0) {
 
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            lib_handle = android_dlopen(path, RTLD_LAZY);
 
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            dlsym_fn = android_dlsym;
 
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        } else {
 
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            lib_handle = dlopen(path, RTLD_LAZY);
 
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            dlsym_fn = dlsym;
 
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        }
 
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        assert(lib_handle && "Error loading ubuntu_application_api");
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    }
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    }
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    void* lib_handle;
 
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    void* (*dlsym_fn) (void*, const char*);
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};
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}