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#include "rust_internal.h"
struct
command_line_args : public kernel_owned<command_line_args>
{
rust_kernel *kernel;
rust_task *task;
int argc;
char **argv;
// vec[str] passed to rust_task::start.
rust_vec *args;
command_line_args(rust_task *task,
int sys_argc,
char **sys_argv)
: kernel(task->kernel),
task(task),
argc(sys_argc),
argv(sys_argv),
args(NULL)
{
#if defined(__WIN32__)
LPCWSTR cmdline = GetCommandLineW();
LPWSTR *wargv = CommandLineToArgvW(cmdline, &argc);
kernel->win32_require("CommandLineToArgvW", wargv != NULL);
argv = (char **) kernel->malloc(sizeof(char*) * argc,
"win32 command line");
for (int i = 0; i < argc; ++i) {
int n_chars = WideCharToMultiByte(CP_UTF8, 0, wargv[i], -1,
NULL, 0, NULL, NULL);
kernel->win32_require("WideCharToMultiByte(0)", n_chars != 0);
argv[i] = (char *) kernel->malloc(n_chars,
"win32 command line arg");
n_chars = WideCharToMultiByte(CP_UTF8, 0, wargv[i], -1,
argv[i], n_chars, NULL, NULL);
kernel->win32_require("WideCharToMultiByte(1)", n_chars != 0);
}
LocalFree(wargv);
#endif
size_t vec_fill = sizeof(rust_str *) * argc;
size_t vec_alloc = next_power_of_two(sizeof(rust_vec) + vec_fill);
void *mem = kernel->malloc(vec_alloc, "command line");
args = new (mem) rust_vec(vec_alloc, 0, NULL);
rust_str **strs = (rust_str**) &args->data[0];
for (int i = 0; i < argc; ++i) {
size_t str_fill = strlen(argv[i]) + 1;
size_t str_alloc = next_power_of_two(sizeof(rust_str) + str_fill);
mem = kernel->malloc(str_alloc, "command line arg");
strs[i] = new (mem) rust_str(str_alloc, str_fill,
(uint8_t const *)argv[i]);
}
args->fill = vec_fill;
// If the caller has a declared args array, they may drop; but
// we don't know if they have such an array. So we pin the args
// array here to ensure it survives to program-shutdown.
args->ref();
}
~command_line_args() {
if (args) {
// Drop the args we've had pinned here.
rust_str **strs = (rust_str**) &args->data[0];
for (int i = 0; i < argc; ++i)
kernel->free(strs[i]);
kernel->free(args);
}
#ifdef __WIN32__
for (int i = 0; i < argc; ++i) {
kernel->free(argv[i]);
}
kernel->free(argv);
#endif
}
};
#if defined(__WIN32__)
int get_num_cpus() {
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
return (int) sysinfo.dwNumberOfProcessors;
}
#elif defined(__BSD__)
int get_num_cpus() {
/* swiped from http://stackoverflow.com/questions/150355/
programmatically-find-the-number-of-cores-on-a-machine */
unsigned int numCPU;
int mib[4];
size_t len = sizeof(numCPU);
/* set the mib for hw.ncpu */
mib[0] = CTL_HW;
mib[1] = HW_AVAILCPU; // alternatively, try HW_NCPU;
/* get the number of CPUs from the system */
sysctl(mib, 2, &numCPU, &len, NULL, 0);
if( numCPU < 1 ) {
mib[1] = HW_NCPU;
sysctl( mib, 2, &numCPU, &len, NULL, 0 );
if( numCPU < 1 ) {
numCPU = 1;
}
}
return numCPU;
}
#elif defined(__GNUC__)
int get_num_cpus() {
return sysconf(_SC_NPROCESSORS_ONLN);
}
#endif
int get_num_threads()
{
char *env = getenv("RUST_THREADS");
if(env) {
int num = atoi(env);
if(num > 0)
return num;
}
return get_num_cpus();
}
/**
* Main entry point into the Rust runtime. Here we create a Rust service,
* initialize the kernel, create the root domain and run it.
*/
int check_claims = 0;
void enable_claims(void* ck) { check_claims = (ck != 0); }
extern "C" CDECL int
rust_start(uintptr_t main_fn, int argc, char **argv, void* crate_map) {
update_log_settings(crate_map, getenv("RUST_LOG"));
enable_claims(getenv("CHECK_CLAIMS"));
int num_threads = get_num_threads();
rust_srv *srv = new rust_srv();
rust_kernel *kernel = new rust_kernel(srv, num_threads);
kernel->start();
rust_task *root_task = kernel->create_task(NULL, "main");
rust_scheduler *sched = root_task->sched;
command_line_args *args
= new (kernel, "main command line args")
command_line_args(root_task, argc, argv);
DLOG(sched, dom, "startup: %d args in 0x%" PRIxPTR,
args->argc, (uintptr_t)args->args);
for (int i = 0; i < args->argc; i++) {
DLOG(sched, dom, "startup: arg[%d] = '%s'", i, args->argv[i]);
}
root_task->start(main_fn, (uintptr_t)args->args);
DLOG(sched, dom, "Using %d worker threads.", num_threads);
int ret = kernel->start_task_threads();
delete args;
delete kernel;
delete srv;
#if !defined(__WIN32__)
// Don't take down the process if the main thread exits without an
// error.
if (!ret)
pthread_exit(NULL);
#endif
return ret;
}
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End:
//
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