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spawn_and_go.v
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spawn_and_go.v
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// Copyright (c) 2019-2024 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module c
import v.ast
import v.util
enum SpawnGoMode {
spawn_
go_
}
fn (mut g Gen) spawn_and_go_expr(node ast.SpawnExpr, mode SpawnGoMode) {
is_spawn := mode == .spawn_
is_go := mode == .go_
if is_spawn {
g.writeln('/*spawn (thread) */')
} else {
g.writeln('/*go (coroutine) */')
}
line := g.go_before_last_stmt()
mut handle := ''
tmp := g.new_tmp_var()
mut expr := node.call_expr
mut name := expr.name
mut use_tmp_fn_var := false
tmp_fn := g.new_tmp_var()
if expr.concrete_types.len > 0 {
name = g.generic_fn_name(expr.concrete_types, name)
} else if expr.is_fn_var && expr.fn_var_type.has_flag(.generic) {
fn_var_type := g.unwrap_generic(expr.fn_var_type)
name = g.typ(fn_var_type)
}
if expr.is_method {
receiver_sym := g.table.sym(g.unwrap_generic(expr.receiver_type))
name = receiver_sym.cname + '_' + name
} else if mut expr.left is ast.AnonFn {
if expr.left.inherited_vars.len > 0 {
fn_var := g.fn_var_signature(expr.left.decl.return_type, expr.left.decl.params.map(it.typ),
tmp_fn)
g.write('\t${fn_var} = ')
g.gen_anon_fn(mut expr.left)
g.writeln(';')
use_tmp_fn_var = true
name = g.anon_fn_cname(expr.left.decl.return_type, expr.left.decl.params.map(it.typ))
} else {
g.gen_anon_fn_decl(mut expr.left)
name = expr.left.decl.name
}
} else if expr.left is ast.IndexExpr {
if expr.is_fn_var {
fn_sym := g.table.sym(expr.fn_var_type)
func := (fn_sym.info as ast.FnType).func
fn_var := g.fn_var_signature(func.return_type, func.params.map(it.typ), tmp_fn)
g.write('\t${fn_var} = ')
g.expr(expr.left)
g.writeln(';')
name = fn_sym.cname
use_tmp_fn_var = true
}
}
name = util.no_dots(name)
if g.pref.obfuscate && g.cur_mod.name == 'main' && name.starts_with('main__') {
mut key := expr.name
if expr.is_method {
sym := g.table.sym(expr.receiver_type)
key = sym.name + '.' + expr.name
}
g.write('/* obf go: ${key} */')
name = g.obf_table[key] or {
panic('cgen: obf name "${key}" not found, this should never happen')
}
}
g.empty_line = true
g.writeln('// start go')
wrapper_struct_name := 'thread_arg_' + name
wrapper_fn_name := name + '_thread_wrapper'
arg_tmp_var := 'arg_' + tmp
if is_spawn {
g.writeln('${wrapper_struct_name} *${arg_tmp_var} = (${wrapper_struct_name} *) _v_malloc(sizeof(thread_arg_${name}));')
} else if is_go {
g.writeln('${wrapper_struct_name} ${arg_tmp_var};')
}
dot := if is_spawn { '->' } else { '.' }
fn_name := if use_tmp_fn_var {
tmp_fn
} else if expr.is_fn_var {
expr.name
} else {
name
}
if !(expr.is_method && (g.table.sym(expr.receiver_type).kind == .interface_
|| (g.table.sym(expr.receiver_type).kind == .struct_ && expr.is_field))) {
g.writeln('${arg_tmp_var}${dot}fn = ${fn_name};')
}
if expr.is_method {
g.write('${arg_tmp_var}${dot}arg0 = ')
g.expr(expr.left)
g.writeln(';')
}
for i, arg in expr.args {
g.write('${arg_tmp_var}${dot}arg${i + 1} = ')
g.expr(arg.expr)
g.writeln(';')
}
s_ret_typ := g.typ(node.call_expr.return_type)
if g.pref.os == .windows && node.call_expr.return_type != ast.void_type {
g.writeln('${arg_tmp_var}->ret_ptr = (void *) _v_malloc(sizeof(${s_ret_typ}));')
}
is_opt := node.call_expr.return_type.has_flag(.option)
is_res := node.call_expr.return_type.has_flag(.result)
mut gohandle_name := ''
if node.call_expr.return_type == ast.void_type {
if is_opt {
gohandle_name = '__v_thread_Option_void'
} else if is_res {
gohandle_name = '__v_thread_Result_void'
} else {
gohandle_name = '__v_thread'
}
} else {
ret_styp := g.typ(g.unwrap_generic(node.call_expr.return_type)).replace('*', '_ptr')
gohandle_name = '__v_thread_${ret_styp}'
}
if is_spawn {
if g.pref.os == .windows {
simple_handle := if node.is_expr && node.call_expr.return_type != ast.void_type {
'thread_handle_${tmp}'
} else {
'thread_${tmp}'
}
stack_size := g.get_cur_thread_stack_size(expr.name)
g.writeln('HANDLE ${simple_handle} = CreateThread(0, ${stack_size}, (LPTHREAD_START_ROUTINE)${wrapper_fn_name}, ${arg_tmp_var}, 0, 0); // fn: ${expr.name}')
g.writeln('if (!${simple_handle}) panic_lasterr(tos3("`go ${name}()`: "));')
if node.is_expr && node.call_expr.return_type != ast.void_type {
g.writeln('${gohandle_name} thread_${tmp} = {')
g.writeln('\t.ret_ptr = ${arg_tmp_var}->ret_ptr,')
g.writeln('\t.handle = thread_handle_${tmp}')
g.writeln('};')
}
if !node.is_expr {
g.writeln('CloseHandle(thread_${tmp});')
}
} else {
g.writeln('pthread_t thread_${tmp};')
mut sthread_attributes := 'NULL'
if g.pref.os != .vinix {
g.writeln('pthread_attr_t thread_${tmp}_attributes;')
g.writeln('pthread_attr_init(&thread_${tmp}_attributes);')
size := g.get_cur_thread_stack_size(expr.name)
g.writeln('pthread_attr_setstacksize(&thread_${tmp}_attributes, ${size}); // fn: ${expr.name}')
sthread_attributes = '&thread_${tmp}_attributes'
}
g.writeln('int ${tmp}_thr_res = pthread_create(&thread_${tmp}, ${sthread_attributes}, (void*)${wrapper_fn_name}, ${arg_tmp_var});')
g.writeln('if (${tmp}_thr_res) panic_error_number(tos3("`go ${name}()`: "), ${tmp}_thr_res);')
if !node.is_expr {
g.writeln('pthread_detach(thread_${tmp});')
}
}
} else if is_go {
if util.nr_jobs > 1 {
g.writeln('photon_thread_create_and_migrate_to_work_pool((void*)${wrapper_fn_name}, &${arg_tmp_var});')
} else {
g.writeln('photon_thread_create((void*)${wrapper_fn_name}, &${arg_tmp_var});')
}
}
g.writeln('// end go')
if node.is_expr {
handle = 'thread_${tmp}'
// create wait handler for this return type if none exists
waiter_fn_name := gohandle_name + '_wait'
mut should_register := false
lock g.waiter_fns {
if waiter_fn_name !in g.waiter_fns {
g.waiter_fns << waiter_fn_name
should_register = true
}
}
if should_register {
g.gowrappers.writeln('\n${s_ret_typ} ${waiter_fn_name}(${gohandle_name} thread) {')
mut c_ret_ptr_ptr := 'NULL'
if node.call_expr.return_type != ast.void_type {
g.gowrappers.writeln('\t${s_ret_typ}* ret_ptr;')
c_ret_ptr_ptr = '&ret_ptr'
}
if g.pref.os == .windows {
if node.call_expr.return_type == ast.void_type {
g.gowrappers.writeln('\tu32 stat = WaitForSingleObject(thread, INFINITE);')
} else {
g.gowrappers.writeln('\tu32 stat = WaitForSingleObject(thread.handle, INFINITE);')
g.gowrappers.writeln('\tret_ptr = thread.ret_ptr;')
}
} else {
g.gowrappers.writeln('\tint stat = pthread_join(thread, (void **)${c_ret_ptr_ptr});')
}
g.gowrappers.writeln('\tif (stat != 0) { _v_panic(_SLIT("unable to join thread")); }')
if g.pref.os == .windows {
if node.call_expr.return_type == ast.void_type {
g.gowrappers.writeln('\tCloseHandle(thread);')
} else {
g.gowrappers.writeln('\tCloseHandle(thread.handle);')
}
}
if node.call_expr.return_type != ast.void_type {
g.gowrappers.writeln('\t${s_ret_typ} ret = *ret_ptr;')
g.gowrappers.writeln('\t_v_free(ret_ptr);')
g.gowrappers.writeln('\treturn ret;')
}
g.gowrappers.writeln('}')
}
}
// Register the wrapper type and function
mut should_register := false
lock g.threaded_fns {
if name !in g.threaded_fns {
g.threaded_fns << name
should_register = true
}
}
if should_register {
g.type_definitions.writeln('\ntypedef struct ${wrapper_struct_name} {')
mut fn_var := ''
if node.call_expr.is_fn_var {
fn_sym := g.table.sym(node.call_expr.fn_var_type)
info := fn_sym.info as ast.FnType
fn_var = g.fn_var_signature(info.func.return_type, info.func.params.map(it.typ),
'fn')
} else if node.call_expr.left is ast.AnonFn {
f := node.call_expr.left.decl
fn_var = g.fn_var_signature(f.return_type, f.params.map(it.typ), 'fn')
} else {
if node.call_expr.is_method {
rec_sym := g.table.sym(g.unwrap_generic(node.call_expr.receiver_type))
if f := rec_sym.find_method_with_generic_parent(node.call_expr.name) {
mut muttable := unsafe { &ast.Table(g.table) }
return_type := muttable.resolve_generic_to_concrete(f.return_type,
f.generic_names, node.call_expr.concrete_types) or { f.return_type }
mut arg_types := f.params.map(it.typ)
arg_types = arg_types.map(muttable.resolve_generic_to_concrete(it,
f.generic_names, node.call_expr.concrete_types) or { it })
fn_var = g.fn_var_signature(return_type, arg_types, 'fn')
}
} else {
if f := g.table.find_fn(node.call_expr.name) {
mut muttable := unsafe { &ast.Table(g.table) }
return_type := muttable.resolve_generic_to_concrete(f.return_type,
f.generic_names, node.call_expr.concrete_types) or { f.return_type }
mut arg_types := f.params.map(it.typ)
arg_types = arg_types.map(muttable.resolve_generic_to_concrete(it,
f.generic_names, node.call_expr.concrete_types) or { it })
for i, typ in arg_types {
mut typ_sym := g.table.sym(typ)
for {
if mut typ_sym.info is ast.Array {
typ_sym = g.table.sym(typ_sym.info.elem_type)
} else {
if typ_sym.info is ast.FnType {
arg_types[i] = expr.args[i].typ
}
break
}
}
}
fn_var = g.fn_var_signature(return_type, arg_types, 'fn')
}
}
}
if fn_var != '' {
g.type_definitions.writeln('\t${fn_var};')
}
if expr.is_method {
styp := g.typ(expr.receiver_type)
g.type_definitions.writeln('\t${styp} arg0;')
}
need_return_ptr := g.pref.os == .windows && node.call_expr.return_type != ast.void_type
for i, arg in expr.args {
arg_sym := g.table.sym(arg.typ)
if arg_sym.info is ast.FnType {
sig := g.fn_var_signature(arg_sym.info.func.return_type, arg_sym.info.func.params.map(it.typ),
'arg${i + 1}')
g.type_definitions.writeln('\t' + sig + ';')
} else {
styp := g.typ(arg.typ)
g.type_definitions.writeln('\t${styp} arg${i + 1};')
}
}
if need_return_ptr {
g.type_definitions.writeln('\tvoid* ret_ptr;')
}
g.type_definitions.writeln('} ${wrapper_struct_name};')
thread_ret_type := if g.pref.os == .windows { 'u32' } else { 'void*' }
g.type_definitions.writeln('${g.static_modifier} ${thread_ret_type} ${wrapper_fn_name}(${wrapper_struct_name} *arg);')
g.gowrappers.writeln('${thread_ret_type} ${wrapper_fn_name}(${wrapper_struct_name} *arg) {')
if node.call_expr.return_type != ast.void_type {
if g.pref.os == .windows {
g.gowrappers.write_string('\t*((${s_ret_typ}*)(arg->ret_ptr)) = ')
} else {
g.gowrappers.writeln('\t${s_ret_typ}* ret_ptr = (${s_ret_typ}*) _v_malloc(sizeof(${s_ret_typ}));')
g.gowrappers.write_string('\t*ret_ptr = ')
}
} else {
g.gowrappers.write_string('\t')
}
if expr.is_method {
unwrapped_rec_type := g.unwrap_generic(expr.receiver_type)
typ_sym := g.table.sym(unwrapped_rec_type)
if typ_sym.kind == .interface_
&& (typ_sym.info as ast.Interface).defines_method(expr.name) {
rec_cc_type := g.cc_type(unwrapped_rec_type, false)
receiver_type_name := util.no_dots(rec_cc_type)
g.gowrappers.write_string('${c_name(receiver_type_name)}_name_table[')
g.gowrappers.write_string('arg->arg0')
idot := if expr.left_type.is_ptr() { '->' } else { '.' }
mname := c_name(expr.name)
g.gowrappers.write_string('${idot}_typ]._method_${mname}(')
g.gowrappers.write_string('arg->arg0')
g.gowrappers.write_string('${idot}_object')
} else if typ_sym.kind == .struct_ && expr.is_field {
g.gowrappers.write_string('arg->arg0')
idot := if expr.left_type.is_ptr() { '->' } else { '.' }
mname := c_name(expr.name)
g.gowrappers.write_string('${idot}${mname}(')
} else {
g.gowrappers.write_string('arg->fn(')
g.gowrappers.write_string('arg->arg0')
}
if expr.args.len > 0 && (typ_sym.kind != .struct_ || !expr.is_field) {
g.gowrappers.write_string(', ')
}
} else {
g.gowrappers.write_string('arg->fn(')
}
if expr.args.len > 0 {
mut has_cast := false
for i in 0 .. expr.args.len {
if g.table.sym(expr.expected_arg_types[i]).kind == .interface_
&& g.table.sym(expr.args[i].typ).kind != .interface_ {
has_cast = true
break
}
}
if has_cast {
pos := g.out.len
g.call_args(expr)
mut call_args_str := g.out.after(pos)
g.go_back(call_args_str.len)
mut rep_group := []string{cap: 2 * expr.args.len}
for i in 0 .. expr.args.len {
rep_group << g.expr_string(expr.args[i].expr)
rep_group << 'arg->arg${i + 1}'
}
call_args_str = call_args_str.replace_each(rep_group)
g.gowrappers.write_string(call_args_str)
} else if expr.name in ['print', 'println', 'eprint', 'eprintln', 'panic']
&& expr.args[0].typ != ast.string_type {
pos := g.out.len
g.gen_expr_to_string(expr.args[0].expr, expr.args[0].typ)
mut call_args_str := g.out.after(pos)
g.out.go_back(call_args_str.len)
mut rep_group := []string{cap: 2 * expr.args.len}
for i in 0 .. expr.args.len {
rep_group << g.expr_string(expr.args[i].expr)
rep_group << 'arg->arg${i + 1}'
}
call_args_str = call_args_str.replace_each(rep_group)
g.gowrappers.write_string(call_args_str)
} else {
for i in 0 .. expr.args.len {
expected_nr_muls := expr.expected_arg_types[i].nr_muls()
arg_nr_muls := expr.args[i].typ.nr_muls()
if arg_nr_muls > expected_nr_muls {
g.gowrappers.write_string('*'.repeat(arg_nr_muls - expected_nr_muls))
} else if arg_nr_muls < expected_nr_muls {
g.gowrappers.write_string('&'.repeat(expected_nr_muls - arg_nr_muls))
}
g.gowrappers.write_string('arg->arg${i + 1}')
if i != expr.args.len - 1 {
g.gowrappers.write_string(', ')
}
}
}
}
g.gowrappers.writeln(');')
if is_spawn {
g.gowrappers.writeln('\t_v_free(arg);')
}
if g.pref.os != .windows && node.call_expr.return_type != ast.void_type {
g.gowrappers.writeln('\treturn ret_ptr;')
} else {
g.gowrappers.writeln('\treturn 0;')
}
g.gowrappers.writeln('}')
}
if node.is_expr {
g.empty_line = false
g.write(line)
g.write(handle)
}
}
// fn (mut g Gen) go_expr(node ast.GoExpr) {
//}
// get current thread size, if fn hasn't defined return default
@[inline]
fn (mut g Gen) get_cur_thread_stack_size(name string) string {
ast_fn := g.table.fns[name] or { return '${g.pref.thread_stack_size}' }
attrs := ast_fn.attrs
if isnil(attrs) {
return '${g.pref.thread_stack_size}'
}
for attr in attrs {
if attr.name == 'spawn_stack' {
return attr.arg
}
}
return '${g.pref.thread_stack_size}'
}