/**
The runtime entrypoint. The (C ABI) main function generated by rustc calls
`rust_start`, providing the address of the Rust ABI main function, the
platform argument vector, and a `crate_map` the provides some logging
metadata.
*/
extern "C" CDECL int
rust_start(uintptr_t main_fn, int argc, char **argv, void* crate_map) {
#ifndef _WIN32
pthread_key_create(&sched_key, NULL);
#endif
// Load runtime configuration options from the environment.
// FIXME #1497: Should provide a way to get these from the command
// line as well.
rust_env *env = load_env(argc, argv);
global_crate_map = crate_map;
update_gc_metadata(crate_map);
update_log_settings(crate_map, env->logspec);
rust_kernel *kernel = new rust_kernel(env);
// Create the main task
rust_sched_id sched_id = kernel->main_sched_id();
rust_scheduler *sched = kernel->get_scheduler_by_id(sched_id);
assert(sched != NULL);
rust_task *root_task = sched->create_task(NULL, "main");
// Schedule the main Rust task
root_task->start((spawn_fn)main_fn, NULL, NULL);
// At this point the task lifecycle is responsible for it
// and our pointer may not be valid
root_task = NULL;
// Run the kernel until all schedulers exit
int ret = kernel->run();
delete kernel;
free_env(env);
return ret;
}
extern "C" CDECL void
rust_update_gc_metadata(const void* map) {
update_gc_metadata(map);
}