grpc_error *grpc_tcp_server_create(grpc_exec_ctx *exec_ctx,
grpc_closure *shutdown_complete,
const grpc_channel_args *args,
grpc_tcp_server **server) {
grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server));
s->resource_quota = grpc_resource_quota_create(NULL);
for (size_t i = 0; i < (args == NULL ? 0 : args->num_args); i++) {
if (0 == strcmp(GRPC_ARG_RESOURCE_QUOTA, args->args[i].key)) {
if (args->args[i].type == GRPC_ARG_POINTER) {
grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota);
s->resource_quota =
grpc_resource_quota_ref_internal(args->args[i].value.pointer.p);
} else {
grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota);
gpr_free(s);
return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
GRPC_ARG_RESOURCE_QUOTA " must be a pointer to a buffer pool");
}
}
}
gpr_ref_init(&s->refs, 1);
s->on_accept_cb = NULL;
s->on_accept_cb_arg = NULL;
s->open_ports = 0;
s->head = NULL;
s->tail = NULL;
s->shutdown_starting.head = NULL;
s->shutdown_starting.tail = NULL;
s->shutdown_complete = shutdown_complete;
*server = s;
return GRPC_ERROR_NONE;
}
grpc_endpoint *grpc_tcp_create(grpc_exec_ctx *exec_ctx, grpc_winsocket *socket,
grpc_channel_args *channel_args,
char *peer_string) {
grpc_resource_quota *resource_quota = grpc_resource_quota_create(NULL);
if (channel_args != NULL) {
for (size_t i = 0; i < channel_args->num_args; i++) {
if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
resource_quota = grpc_resource_quota_ref_internal(
channel_args->args[i].value.pointer.p);
}
}
}
grpc_tcp *tcp = (grpc_tcp *)gpr_malloc(sizeof(grpc_tcp));
memset(tcp, 0, sizeof(grpc_tcp));
tcp->base.vtable = &vtable;
tcp->socket = socket;
gpr_mu_init(&tcp->mu);
gpr_ref_init(&tcp->refcount, 1);
GRPC_CLOSURE_INIT(&tcp->on_read, on_read, tcp, grpc_schedule_on_exec_ctx);
GRPC_CLOSURE_INIT(&tcp->on_write, on_write, tcp, grpc_schedule_on_exec_ctx);
tcp->peer_string = gpr_strdup(peer_string);
tcp->resource_user = grpc_resource_user_create(resource_quota, peer_string);
/* Tell network status tracking code about the new endpoint */
grpc_network_status_register_endpoint(&tcp->base);
return &tcp->base;
}
static void rq_step_sched(grpc_exec_ctx *exec_ctx,
grpc_resource_quota *resource_quota) {
if (resource_quota->step_scheduled) return;
resource_quota->step_scheduled = true;
grpc_resource_quota_ref_internal(resource_quota);
grpc_closure_sched(exec_ctx, &resource_quota->rq_step_closure,
GRPC_ERROR_NONE);
}
/* Public API */
void grpc_resource_quota_resize(grpc_resource_quota *resource_quota,
size_t size) {
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
rq_resize_args *a = gpr_malloc(sizeof(*a));
a->resource_quota = grpc_resource_quota_ref_internal(resource_quota);
a->size = (int64_t)size;
grpc_closure_init(&a->closure, rq_resize, a, grpc_schedule_on_exec_ctx);
grpc_closure_sched(&exec_ctx, &a->closure, GRPC_ERROR_NONE);
grpc_exec_ctx_finish(&exec_ctx);
}
grpc_resource_quota *grpc_resource_quota_from_channel_args(
const grpc_channel_args *channel_args) {
for (size_t i = 0; i < channel_args->num_args; i++) {
if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
if (channel_args->args[i].type == GRPC_ARG_POINTER) {
return grpc_resource_quota_ref_internal(
channel_args->args[i].value.pointer.p);
} else {
gpr_log(GPR_DEBUG, GRPC_ARG_RESOURCE_QUOTA " should be a pointer");
}
}
}
return grpc_resource_quota_create(NULL);
}
grpc_resource_user *grpc_resource_user_create(
grpc_resource_quota *resource_quota, const char *name) {
grpc_resource_user *resource_user = gpr_malloc(sizeof(*resource_user));
resource_user->resource_quota =
grpc_resource_quota_ref_internal(resource_quota);
grpc_closure_init(&resource_user->allocate_closure, &ru_allocate,
resource_user,
grpc_combiner_scheduler(resource_quota->combiner, false));
grpc_closure_init(&resource_user->add_to_free_pool_closure,
&ru_add_to_free_pool, resource_user,
grpc_combiner_scheduler(resource_quota->combiner, false));
grpc_closure_init(&resource_user->post_reclaimer_closure[0],
&ru_post_benign_reclaimer, resource_user,
grpc_combiner_scheduler(resource_quota->combiner, false));
grpc_closure_init(&resource_user->post_reclaimer_closure[1],
&ru_post_destructive_reclaimer, resource_user,
grpc_combiner_scheduler(resource_quota->combiner, false));
grpc_closure_init(&resource_user->destroy_closure, &ru_destroy, resource_user,
grpc_combiner_scheduler(resource_quota->combiner, false));
gpr_mu_init(&resource_user->mu);
gpr_atm_rel_store(&resource_user->refs, 1);
gpr_atm_rel_store(&resource_user->shutdown, 0);
resource_user->free_pool = 0;
grpc_closure_list_init(&resource_user->on_allocated);
resource_user->allocating = false;
resource_user->added_to_free_pool = false;
resource_user->reclaimers[0] = NULL;
resource_user->reclaimers[1] = NULL;
resource_user->new_reclaimers[0] = NULL;
resource_user->new_reclaimers[1] = NULL;
for (int i = 0; i < GRPC_RULIST_COUNT; i++) {
resource_user->links[i].next = resource_user->links[i].prev = NULL;
}
if (name != NULL) {
resource_user->name = gpr_strdup(name);
} else {
gpr_asprintf(&resource_user->name, "anonymous_resource_user_%" PRIxPTR,
(intptr_t)resource_user);
}
return resource_user;
}
static void tcp_client_connect_impl(grpc_exec_ctx *exec_ctx,
grpc_closure *closure, grpc_endpoint **ep,
grpc_pollset_set *interested_parties,
const grpc_channel_args *channel_args,
const grpc_resolved_address *resolved_addr,
gpr_timespec deadline) {
grpc_uv_tcp_connect *connect;
grpc_resource_quota *resource_quota = grpc_resource_quota_create(NULL);
(void)channel_args;
(void)interested_parties;
if (channel_args != NULL) {
for (size_t i = 0; i < channel_args->num_args; i++) {
if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
resource_quota = grpc_resource_quota_ref_internal(
channel_args->args[i].value.pointer.p);
}
}
}
connect = gpr_malloc(sizeof(grpc_uv_tcp_connect));
memset(connect, 0, sizeof(grpc_uv_tcp_connect));
connect->closure = closure;
connect->endpoint = ep;
connect->tcp_handle = gpr_malloc(sizeof(uv_tcp_t));
connect->addr_name = grpc_sockaddr_to_uri(resolved_addr);
connect->resource_quota = resource_quota;
uv_tcp_init(uv_default_loop(), connect->tcp_handle);
connect->connect_req.data = connect;
// TODO(murgatroid99): figure out what the return value here means
uv_tcp_connect(&connect->connect_req, connect->tcp_handle,
(const struct sockaddr *)resolved_addr->addr,
uv_tc_on_connect);
grpc_closure_init(&connect->on_alarm, uv_tc_on_alarm, connect,
grpc_schedule_on_exec_ctx);
grpc_timer_init(exec_ctx, &connect->alarm,
gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
&connect->on_alarm, gpr_now(GPR_CLOCK_MONOTONIC));
}
/* returns true if reclamation is proceeding */
static bool rq_reclaim(grpc_exec_ctx *exec_ctx,
grpc_resource_quota *resource_quota, bool destructive) {
if (resource_quota->reclaiming) return true;
grpc_rulist list = destructive ? GRPC_RULIST_RECLAIMER_DESTRUCTIVE
: GRPC_RULIST_RECLAIMER_BENIGN;
grpc_resource_user *resource_user = rulist_pop_head(resource_quota, list);
if (resource_user == NULL) return false;
if (grpc_resource_quota_trace) {
gpr_log(GPR_DEBUG, "RQ %s %s: initiate %s reclamation",
resource_quota->name, resource_user->name,
destructive ? "destructive" : "benign");
}
resource_quota->reclaiming = true;
grpc_resource_quota_ref_internal(resource_quota);
grpc_closure *c = resource_user->reclaimers[destructive];
GPR_ASSERT(c);
resource_quota->debug_only_last_reclaimer_resource_user = resource_user;
resource_quota->debug_only_last_initiated_reclaimer = c;
resource_user->reclaimers[destructive] = NULL;
grpc_closure_run(exec_ctx, c, GRPC_ERROR_NONE);
return true;
}
/* Public API */
void grpc_resource_quota_ref(grpc_resource_quota *resource_quota) {
grpc_resource_quota_ref_internal(resource_quota);
}
