| 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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| 30 | if ( required && error ) {
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| 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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