void
VSM_Init(void)
{
uint32_t *vsl_log_start;
pthread_t tp;
AZ(pthread_mutex_init(&vsl_mtx, NULL));
AZ(pthread_mutex_init(&vsm_mtx, NULL));
vsl_log_start = VSM_Alloc(cache_param->vsl_space, VSL_CLASS, "", "");
AN(vsl_log_start);
vsl_log_start[1] = VSL_ENDMARKER;
VWMB();
do
*vsl_log_start = random() & 0xffff;
while (*vsl_log_start == 0);
VWMB();
vsl_start = vsl_log_start;
vsl_end = vsl_start +
cache_param->vsl_space / (unsigned)sizeof *vsl_end;
vsl_ptr = vsl_start + 1;
VSC_C_main = VSM_Alloc(sizeof *VSC_C_main,
VSC_CLASS, VSC_TYPE_MAIN, "");
AN(VSC_C_main);
vsl_wrap();
// VSM_head->starttime = (intmax_t)VTIM_real();
memset(VSC_C_main, 0, sizeof *VSC_C_main);
// VSM_head->child_pid = getpid();
AZ(pthread_create(&tp, NULL, vsm_cleaner, NULL));
}
static void
vsl_wrap(void)
{
assert(vsl_ptr >= vsl_start + 1);
assert(vsl_ptr < vsl_end);
vsl_start[1] = VSL_ENDMARKER;
do
vsl_start[0]++;
while (vsl_start[0] == 0);
VWMB();
if (vsl_ptr != vsl_start + 1) {
*vsl_ptr = VSL_WRAPMARKER;
vsl_ptr = vsl_start + 1;
}
VSC_C_main->shm_cycles++;
}
void
VSL_Flush(struct vsl_log *vsl, int overflow)
{
uint32_t *p;
unsigned l;
l = pdiff(vsl->wlb, vsl->wlp);
if (l == 0)
return;
assert(l >= 8);
p = vsl_get(l - 8, vsl->wlr, overflow);
memcpy(p + 1, vsl->wlb + 1, l - 4);
VWMB();
p[0] = vsl->wlb[0];
vsl->wlp = vsl->wlb;
vsl->wlr = 0;
}
void
WSL_Flush(struct worker *wrk, int overflow)
{
uint32_t *p;
unsigned l;
l = pdiff(wrk->wlb, wrk->wlp);
if (l == 0)
return;
assert(l >= 8);
p = vsl_get(l - 8, wrk->wlr, overflow);
memcpy(p + 1, wrk->wlb + 1, l - 4);
VWMB();
p[0] = wrk->wlb[0];
wrk->wlp = wrk->wlb;
wrk->wlr = 0;
}