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infra: allow lazy alivelink updates

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Thomas Schoebel-Theuer 2019-07-23 11:21:48 +02:00 committed by Thomas Schoebel-Theuer
parent 692cb442c8
commit e78d726a70
1 changed files with 17 additions and 3 deletions
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20
kernel/sy_old/mars_main.c
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@ -380,26 +380,40 @@ const char *rot_keys[] = {
#define IS_JAMMED() (mars_emergency_mode > 3)
static
void _make_alivelink_str(const char *name, const char *src)
void __make_alivelink_str(const char *name, const char *src, bool lazy)
{
char *dst = path_make("/mars/%s-%s", name, my_id());
if (!src || !dst) {
MARS_ERR("cannot make alivelink paths\n");
goto err;
}
if (lazy) {
char *check = mars_readlink(dst);
bool ok = (check && !strcmp(check, src));
brick_string_free(check);
if (ok) {
MARS_DBG("symlink '%s' -> '%s' has not changed\n", src, dst);
goto err;
}
}
MARS_DBG("'%s' -> '%s'\n", src, dst);
ordered_symlink(src, dst, NULL);
err:
brick_string_free(dst);
}
#define _make_alivelink_str(name,src) \
__make_alivelink_str(name,src,false)
static
void _make_alivelink(const char *name, loff_t val)
void __make_alivelink(const char *name, loff_t val, bool lazy)
{
char *src = path_make("%lld", val);
_make_alivelink_str(name, src);
__make_alivelink_str(name, src, lazy);
brick_string_free(src);
}
#define _make_alivelink(name,val) \
__make_alivelink(name,val,false)
static
int compute_emergency_mode(void)