[29185fc] | 1 | #include "thread.hpp" |
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| 2 | |
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| 3 | #include <cstdarg> // va_start, va_end |
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| 4 | #include <cstdio> |
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| 5 | #include <cstring> // strlen |
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| 6 | extern "C" { |
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| 7 | #include <unistd.h> // _exit, getpid |
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| 8 | #include <signal.h> |
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| 9 | #include <dlfcn.h> // dlopen, dlsym |
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| 10 | #include <execinfo.h> // backtrace, messages |
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| 11 | } |
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| 12 | |
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| 13 | #include <iostream> |
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| 14 | #include <string> |
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| 15 | |
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| 16 | using thrdlib::thread_t; |
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| 17 | |
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| 18 | thread_t (*thrdlib::create)( void (*main)( thread_t ) ) = nullptr; |
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| 19 | void (*thrdlib::join)( thread_t handle ) = nullptr; |
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| 20 | void (*thrdlib::park)( thread_t handle ) = nullptr; |
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| 21 | void (*thrdlib::unpark)( thread_t handle ) = nullptr; |
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| 22 | void (*thrdlib::yield)( void ) = nullptr; |
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| 23 | void (*lib_clean)(void) = nullptr; |
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| 24 | |
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| 25 | typedef void (*fptr_t)(); |
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| 26 | static fptr_t open_symbol( void * library, const char * symbol, bool required ) { |
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| 27 | void * ptr = dlsym( library, symbol ); |
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| 28 | |
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| 29 | const char * error = dlerror(); |
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[4e39f51] | 30 | if ( required && error ) { |
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[29185fc] | 31 | std::cerr << "Fetching symbol '" << symbol << "' failed with error '" << error << "'\n"; |
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| 32 | std::abort(); |
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| 33 | } |
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| 34 | |
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| 35 | return (fptr_t)ptr; |
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| 36 | } |
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| 37 | |
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| 38 | //-------------------- |
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| 39 | // Basic kernel features |
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| 40 | void thrdlib::init( const char * name, int procs ) { |
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| 41 | std::string file = __FILE__; |
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| 42 | std::size_t found = file.find_last_of("/"); |
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| 43 | std::string libname = file.substr(0,found+1) + name + ".so"; |
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| 44 | |
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| 45 | std::cout << "Use framework " << name << "(" << libname << ")\n"; |
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| 46 | |
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| 47 | void * library = dlopen( libname.c_str(), RTLD_NOW ); |
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| 48 | if ( const char * error = dlerror() ) { |
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| 49 | std::cerr << "Could not open library '" << libname << "' from name '" << name <<"'\n"; |
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| 50 | std::cerr << "Error was : '" << error << "'\n"; |
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| 51 | std::abort(); |
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| 52 | } |
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| 53 | |
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| 54 | void (*lib_init)( int ) = (void (*)( int ))open_symbol( library, "thrdlib_init", false ); |
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| 55 | lib_clean = open_symbol( library, "thrdlib_clean" , false ); |
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| 56 | |
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| 57 | thrdlib::create = (typeof(thrdlib::create))open_symbol( library, "thrdlib_create", true ); |
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| 58 | thrdlib::join = (typeof(thrdlib::join ))open_symbol( library, "thrdlib_join" , true ); |
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| 59 | thrdlib::park = (typeof(thrdlib::park ))open_symbol( library, "thrdlib_park" , true ); |
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| 60 | thrdlib::unpark = (typeof(thrdlib::unpark))open_symbol( library, "thrdlib_unpark", true ); |
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| 61 | thrdlib::yield = (typeof(thrdlib::yield ))open_symbol( library, "thrdlib_yield" , true ); |
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| 62 | |
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| 63 | lib_init( procs ); |
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| 64 | } |
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| 65 | |
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| 66 | void thrdlib::clean( void ) { |
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| 67 | if(lib_clean) lib_clean(); |
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| 68 | } |
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