mirror of
https://github.com/ilyakooo0/urbit.git
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122 lines
2.1 KiB
C
122 lines
2.1 KiB
C
/* v/save.c
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**
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** This file is in the public domain.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <setjmp.h>
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#include <gmp.h>
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#include <stdint.h>
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#include <termios.h>
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#include <uv.h>
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#include "all.h"
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#include "v/vere.h"
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/* _save_sign_cb: signal callback.
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*/
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static void
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_save_sign_cb(uv_signal_t* sil_u, c3_i num_i)
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{
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uL(fprintf(uH, "save: signal %d\n", num_i));
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{
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switch ( num_i ) {
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case SIGCHLD: u2_save_ef_chld(); break;
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}
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}
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}
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/* _save_time_cb(): timer callback.
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*/
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static void
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_save_time_cb(uv_timer_t* tim_u, c3_i sas_i)
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{
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u2_save* sav_u = &u2_Host.sav_u;
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if ( sav_u->pid_w ) {
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return;
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}
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if ( u2A->ent_w > sav_u->ent_w ) {
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// uL(fprintf(uH, "autosaving... ent_w %d\n", u2A->ent_w));
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u2_cm_purge();
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u2_lo_grab("save", u2_none);
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#ifdef FORKPT
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c3_w pid_w;
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if ( 0 == (pid_w = fork()) ) {
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u2_loom_save(u2A->ent_w);
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exit(0);
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}
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else {
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uL(fprintf(uH, "checkpoint: process %d\n", pid_w));
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sav_u->ent_w = u2A->ent_w;
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sav_u->pid_w = pid_w;
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}
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#else
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u2_loom_save(u2A->ent_w);
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sav_u->ent_w = u2A->ent_w;
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#endif
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}
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}
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/* u2_save_ef_chld(): report save termination.
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*/
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void
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u2_save_ef_chld(void)
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{
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u2_save* sav_u = &u2_Host.sav_u;
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c3_i loc_i;
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c3_w pid_w;
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/* modified for cases with no pid_w
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*/
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uL(fprintf(uH, "checkpoint: complete %d\n", sav_u->pid_w));
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pid_w = wait(&loc_i);
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if (0 != sav_u->pid_w) {
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c3_assert(pid_w == sav_u->pid_w);
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}
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else {
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c3_assert(pid_w > 0);
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}
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sav_u->pid_w = 0;
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}
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/* u2_save_io_init(): initialize autosave.
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*/
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void
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u2_save_io_init(void)
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{
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u2_save* sav_u = &u2_Host.sav_u;
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sav_u->ent_w = 0;
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sav_u->pid_w = 0;
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uv_timer_init(u2L, &sav_u->tim_u);
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uv_timer_start(&sav_u->tim_u, _save_time_cb, 15000, 15000);
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uv_signal_start(&sav_u->sil_u, _save_sign_cb, SIGCHLD);
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}
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/* u2_save_io_exit(): terminate save I/O.
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*/
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void
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u2_save_io_exit(void)
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{
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}
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/* u2_save_io_poll(): poll kernel for save I/O.
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*/
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void
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u2_save_io_poll(void)
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{
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}
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