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v/vlib/v/gen/live.v
2020-05-14 17:14:24 +02:00

105 lines
3.0 KiB
V

module gen
import v.pref
import v.util
fn (g &Gen) generate_hotcode_reloading_declarations() {
if g.pref.os == .windows {
if g.pref.is_livemain {
g.hotcode_definitions.writeln('HANDLE live_fn_mutex = 0;')
}
if g.pref.is_liveshared {
g.hotcode_definitions.writeln('HANDLE live_fn_mutex;')
}
g.hotcode_definitions.writeln('
void pthread_mutex_lock(HANDLE *m) {
WaitForSingleObject(*m, INFINITE);
}
void pthread_mutex_unlock(HANDLE *m) {
ReleaseMutex(*m);
}
')
} else {
if g.pref.is_livemain {
g.hotcode_definitions.writeln('pthread_mutex_t live_fn_mutex = PTHREAD_MUTEX_INITIALIZER;')
}
if g.pref.is_liveshared {
g.hotcode_definitions.writeln('pthread_mutex_t live_fn_mutex;')
}
}
}
fn (g &Gen) generate_hotcode_reloader_code() {
if g.pref.is_liveshared {
g.hotcode_definitions.writeln('')
return
}
// Hot code reloading
if g.pref.is_livemain {
mut phd := ''
mut load_code := []string{}
if g.pref.os != .windows {
for so_fn in g.hotcode_fn_names {
load_code << 'impl_live_${so_fn} = dlsym(live_lib, "impl_live_${so_fn}");'
}
phd = posix_hotcode_definitions_1
} else {
for so_fn in g.hotcode_fn_names {
load_code << 'impl_live_${so_fn} = (void *)GetProcAddress(live_lib, "impl_live_${so_fn}"); '
}
phd = windows_hotcode_definitions_1
}
g.hotcode_definitions.writeln(phd.replace('@LOAD_FNS@', load_code.join('\n')))
}
}
const (
posix_hotcode_definitions_1 = '
void v_bind_live_symbols(void* live_lib){
@LOAD_FNS@
}
'
windows_hotcode_definitions_1 = '
void v_bind_live_symbols(void* live_lib){
@LOAD_FNS@
}
'
)
fn (g &Gen) generate_hotcode_reloading_main_caller() {
if !g.pref.is_livemain {
return
}
g.writeln('')
// We are in live code reload mode, so start the .so loader in the background
g.writeln('\t// live code initialization section:')
g.writeln('\t{')
g.writeln('\t\t// initialization of live function pointers')
for fname in g.hotcode_fn_names {
g.writeln('\t\timpl_live_${fname} = 0;')
}
vexe := util.cescaped_path( pref.vexe_path() )
file := util.cescaped_path( g.pref.path )
msvc := if g.pref.ccompiler == 'msvc' { '-cc msvc' } else { '' }
so_debug_flag := if g.pref.is_debug { '-cg' } else { '' }
vopts := '$msvc $so_debug_flag -keepc -sharedlive -shared'
//
g.writeln('\t\t// start background reloading thread')
if g.pref.os == .windows {
g.writeln('\t\tlive_fn_mutex = CreateMutexA(0, 0, 0);')
}
g.writeln('\t\tlive__LiveReloadInfo* live_info = live__executable__new_live_reload_info(')
g.writeln('\t\t\t\t\t tos2("$file"),')
g.writeln('\t\t\t\t\t tos2("$vexe"),')
g.writeln('\t\t\t\t\t tos2("$vopts"),')
g.writeln('\t\t\t\t\t &live_fn_mutex,')
g.writeln('\t\t\t\t\t v_bind_live_symbols')
g.writeln('\t\t);')
// g_live_info gives access to the LiveReloadInfo methods,
// to the custom user code, through calling v_live_info()
g.writeln('\t\t g_live_info = (void*)live_info;')
g.writeln('\t\tlive__executable__start_reloader(live_info);')
g.writeln('\t}\t// end of live code initialization section')
g.writeln('')
}