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Convert method config to a struct for use in fast path in client_channel.

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pull/8429/head
Mark D. Roth 8 years ago
parent 29a7f40af3
commit 9d48094a41
1 changed files with 86 additions and 49 deletions
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  1. 135
      src/core/ext/client_config/client_channel.c

135
src/core/ext/client_config/client_channel.c
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@ -60,6 +60,50 @@
/* Client channel implementation */
typedef enum {
WAIT_FOR_READY_UNSET,
WAIT_FOR_READY_FALSE,
WAIT_FOR_READY_TRUE
} wait_for_ready_value;
typedef struct method_parameters {
gpr_timespec timeout;
wait_for_ready_value wait_for_ready;
} method_parameters;
static void *method_parameters_copy(void *value) {
void *new_value = gpr_malloc(sizeof(method_parameters));
memcpy(new_value, value, sizeof(method_parameters));
return new_value;
}
static int method_parameters_cmp(void *value1, void *value2) {
const method_parameters *v1 = value1;
const method_parameters *v2 = value2;
const int retval = gpr_time_cmp(v1->timeout, v2->timeout);
if (retval != 0) return retval;
if (v1->wait_for_ready > v2->wait_for_ready) return 1;
if (v1->wait_for_ready < v2->wait_for_ready) return -1;
return 0;
}
static const grpc_mdstr_hash_table_vtable method_parameters_vtable = {
gpr_free, method_parameters_copy, method_parameters_cmp};
static void *method_config_convert_value(
const grpc_method_config *method_config) {
method_parameters *value = gpr_malloc(sizeof(method_parameters));
const gpr_timespec *timeout = grpc_method_config_get_timeout(method_config);
value->timeout = timeout != NULL ? *timeout : gpr_time_0(GPR_TIMESPAN);
const bool *wait_for_ready =
grpc_method_config_get_wait_for_ready(method_config);
value->wait_for_ready =
wait_for_ready == NULL
? WAIT_FOR_READY_UNSET
: (wait_for_ready ? WAIT_FOR_READY_TRUE : WAIT_FOR_READY_FALSE);
return value;
}
/*************************************************************************
* CHANNEL-WIDE FUNCTIONS
*/
@ -76,8 +120,8 @@ typedef struct client_channel_channel_data {
gpr_mu mu;
/** currently active load balancer */
grpc_lb_policy *lb_policy;
/** method config table */
grpc_method_config_table *method_config_table;
/** maps method names to method_parameters structs */
grpc_mdstr_hash_table *method_params_table;
/** incoming resolver result - set by resolver.next() */
grpc_resolver_result *resolver_result;
/** a list of closures that are all waiting for config to come in */
@ -177,7 +221,7 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg,
channel_data *chand = arg;
grpc_lb_policy *lb_policy = NULL;
grpc_lb_policy *old_lb_policy;
grpc_method_config_table *method_config_table = NULL;
grpc_mdstr_hash_table *method_params_table = NULL;
grpc_connectivity_state state = GRPC_CHANNEL_TRANSIENT_FAILURE;
bool exit_idle = false;
grpc_error *state_error = GRPC_ERROR_CREATE("No load balancing policy");
@ -230,8 +274,9 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg,
lb_policy_args.additional_args, GRPC_ARG_SERVICE_CONFIG);
if (channel_arg != NULL) {
GPR_ASSERT(channel_arg->type == GRPC_ARG_POINTER);
method_config_table = grpc_method_config_table_ref(
(grpc_method_config_table *)channel_arg->value.pointer.p);
method_params_table = grpc_method_config_table_convert(
(grpc_method_config_table *)channel_arg->value.pointer.p,
method_config_convert_value, &method_parameters_vtable);
}
grpc_resolver_result_unref(exec_ctx, chand->resolver_result);
chand->resolver_result = NULL;
@ -245,10 +290,10 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg,
gpr_mu_lock(&chand->mu);
old_lb_policy = chand->lb_policy;
chand->lb_policy = lb_policy;
if (chand->method_config_table != NULL) {
grpc_method_config_table_unref(chand->method_config_table);
if (chand->method_params_table != NULL) {
grpc_mdstr_hash_table_unref(chand->method_params_table);
}
chand->method_config_table = method_config_table;
chand->method_params_table = method_params_table;
if (lb_policy != NULL) {
grpc_exec_ctx_enqueue_list(exec_ctx, &chand->waiting_for_config_closures,
NULL);
@ -409,8 +454,8 @@ static void cc_destroy_channel_elem(grpc_exec_ctx *exec_ctx,
chand->interested_parties);
GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
}
if (chand->method_config_table != NULL) {
grpc_method_config_table_unref(chand->method_config_table);
if (chand->method_params_table != NULL) {
grpc_mdstr_hash_table_unref(chand->method_params_table);
}
grpc_connectivity_state_destroy(exec_ctx, &chand->state_tracker);
grpc_pollset_set_destroy(chand->interested_parties);
@ -448,11 +493,7 @@ typedef struct client_channel_call_data {
grpc_mdstr *path; // Request path.
gpr_timespec call_start_time;
gpr_timespec deadline;
enum {
WAIT_FOR_READY_UNSET,
WAIT_FOR_READY_FALSE,
WAIT_FOR_READY_TRUE
} wait_for_ready_from_service_config;
wait_for_ready_value wait_for_ready_from_service_config;
grpc_closure read_service_config;
grpc_error *cancel_error;
@ -846,40 +887,39 @@ static void read_service_config(grpc_exec_ctx *exec_ctx, void *arg,
if (error == GRPC_ERROR_NONE) {
// Get the method config table from channel data.
gpr_mu_lock(&chand->mu);
grpc_method_config_table *method_config_table = NULL;
if (chand->method_config_table != NULL) {
method_config_table =
grpc_method_config_table_ref(chand->method_config_table);
grpc_mdstr_hash_table *method_params_table = NULL;
if (chand->method_params_table != NULL) {
method_params_table =
grpc_mdstr_hash_table_ref(chand->method_params_table);
}
gpr_mu_unlock(&chand->mu);
// If the method config table was present, use it.
if (method_config_table != NULL) {
const grpc_method_config *method_config =
grpc_method_config_table_get(method_config_table, calld->path);
if (method_config != NULL) {
const gpr_timespec *per_method_timeout =
grpc_method_config_get_timeout(method_config);
const bool *wait_for_ready =
grpc_method_config_get_wait_for_ready(method_config);
if (per_method_timeout != NULL || wait_for_ready != NULL) {
if (method_params_table != NULL) {
const method_parameters *method_params =
grpc_method_config_table_get(method_params_table, calld->path);
if (method_params != NULL) {
const bool have_method_timeout =
gpr_time_cmp(method_params->timeout, gpr_time_0(GPR_TIMESPAN)) != 0;
if (have_method_timeout ||
method_params->wait_for_ready != WAIT_FOR_READY_UNSET) {
gpr_mu_lock(&calld->mu);
if (per_method_timeout != NULL) {
gpr_timespec per_method_deadline =
gpr_time_add(calld->call_start_time, *per_method_timeout);
if (have_method_timeout) {
const gpr_timespec per_method_deadline =
gpr_time_add(calld->call_start_time, method_params->timeout);
if (gpr_time_cmp(per_method_deadline, calld->deadline) < 0) {
calld->deadline = per_method_deadline;
// Reset deadline timer.
grpc_deadline_state_reset(exec_ctx, elem, calld->deadline);
}
}
if (wait_for_ready != NULL) {
if (method_params->wait_for_ready != WAIT_FOR_READY_UNSET) {
calld->wait_for_ready_from_service_config =
*wait_for_ready ? WAIT_FOR_READY_TRUE : WAIT_FOR_READY_FALSE;
method_params->wait_for_ready;
}
gpr_mu_unlock(&calld->mu);
}
}
grpc_method_config_table_unref(method_config_table);
grpc_mdstr_hash_table_unref(method_params_table);
}
}
GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "read_service_config");
@ -916,28 +956,25 @@ static grpc_error *cc_init_call_elem(grpc_exec_ctx *exec_ctx,
gpr_mu_lock(&chand->mu);
if (chand->lb_policy != NULL) {
// We already have a resolver result, so check for service config.
if (chand->method_config_table != NULL) {
grpc_method_config_table *method_config_table =
grpc_method_config_table_ref(chand->method_config_table);
if (chand->method_params_table != NULL) {
grpc_mdstr_hash_table *method_params_table =
grpc_mdstr_hash_table_ref(chand->method_params_table);
gpr_mu_unlock(&chand->mu);
grpc_method_config *method_config =
grpc_method_config_table_get(method_config_table, args->path);
if (method_config != NULL) {
const gpr_timespec *per_method_timeout =
grpc_method_config_get_timeout(method_config);
if (per_method_timeout != NULL) {
method_parameters *method_params =
grpc_method_config_table_get(method_params_table, args->path);
if (method_params != NULL) {
if (gpr_time_cmp(method_params->timeout,
gpr_time_0(GPR_CLOCK_MONOTONIC)) != 0) {
gpr_timespec per_method_deadline =
gpr_time_add(calld->call_start_time, *per_method_timeout);
gpr_time_add(calld->call_start_time, method_params->timeout);
calld->deadline = gpr_time_min(calld->deadline, per_method_deadline);
}
const bool *wait_for_ready =
grpc_method_config_get_wait_for_ready(method_config);
if (wait_for_ready != NULL) {
if (method_params->wait_for_ready != WAIT_FOR_READY_UNSET) {
calld->wait_for_ready_from_service_config =
*wait_for_ready ? WAIT_FOR_READY_TRUE : WAIT_FOR_READY_FALSE;
method_params->wait_for_ready;
}
}
grpc_method_config_table_unref(method_config_table);
grpc_mdstr_hash_table_unref(method_params_table);
} else {
gpr_mu_unlock(&chand->mu);
}

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