/
server.go
147 lines (126 loc) · 2.95 KB
/
server.go
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package main
import (
"fmt"
"net"
"net/rpc"
"runtime"
"sync"
)
//-------------------------------------------------------------------------
// daemon
//-------------------------------------------------------------------------
type daemon struct {
listener net.Listener
cmd_in chan int
autocomplete *auto_complete_context
pkgcache package_cache
declcache *decl_cache
}
func new_daemon(network, address string) *daemon {
var err error
d := new(daemon)
d.listener, err = net.Listen(network, address)
if err != nil {
panic(err)
}
d.cmd_in = make(chan int, 1)
d.pkgcache = new_package_cache()
d.declcache = new_decl_cache()
d.autocomplete = new_auto_complete_context(d.pkgcache, d.declcache)
return d
}
func (this *daemon) drop_cache() {
this.pkgcache = new_package_cache()
this.declcache = new_decl_cache()
this.autocomplete = new_auto_complete_context(this.pkgcache, this.declcache)
}
const (
daemon_close = iota
)
func (this *daemon) loop() {
conn_in := make(chan net.Conn)
go func() {
for {
c, err := this.listener.Accept()
if err != nil {
panic(err)
}
conn_in <- c
}
}()
for {
// handle connections or server CMDs (currently one CMD)
select {
case c := <-conn_in:
rpc.ServeConn(c)
runtime.GC()
case cmd := <-this.cmd_in:
switch cmd {
case daemon_close:
return
}
}
}
}
func (this *daemon) close() {
this.cmd_in <- daemon_close
}
var g_daemon *daemon
//-------------------------------------------------------------------------
// print_backtrace
//-------------------------------------------------------------------------
var g_backtrace_mutex sync.Mutex
func print_backtrace(err interface{}) {
g_backtrace_mutex.Lock()
defer g_backtrace_mutex.Unlock()
fmt.Printf("panic: %v\n", err)
i := 2
for {
pc, file, line, ok := runtime.Caller(i)
if !ok {
break
}
f := runtime.FuncForPC(pc)
fmt.Printf("%d(%s): %s:%d\n", i-1, f.Name(), file, line)
i++
}
fmt.Println("")
}
//-------------------------------------------------------------------------
// server_* functions
//
// Corresponding client_* functions are autogenerated by goremote.
//-------------------------------------------------------------------------
func server_auto_complete(file []byte, filename string, cursor int) (c []candidate, d int) {
defer func() {
if err := recover(); err != nil {
print_backtrace(err)
c = []candidate{
{"PANIC", "PANIC", "PANIC"},
}
// drop cache
g_daemon.drop_cache()
}
}()
return g_daemon.autocomplete.apropos(file, filename, cursor)
}
func server_close(notused int) int {
g_daemon.close()
return 0
}
func server_status(notused int) string {
return g_daemon.autocomplete.status()
}
func server_drop_cache(notused int) int {
// drop cache
g_daemon.drop_cache()
return 0
}
func server_set(key, value string) string {
if key == "\x00" {
return g_config.list()
} else if value == "\x00" {
return g_config.list_option(key)
}
return g_config.set_option(key, value)
}