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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "src/core/lib/transport/transport.h"
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/atm.h>
#include <grpc/support/log.h>
#include <grpc/support/sync.h>
#include "src/core/lib/iomgr/executor.h"
#include "src/core/lib/slice/slice_internal.h"
#include "src/core/lib/slice/slice_string_helpers.h"
#include "src/core/lib/support/string.h"
#include "src/core/lib/transport/transport_impl.h"
#ifdef GRPC_STREAM_REFCOUNT_DEBUG
void grpc_stream_ref(grpc_stream_refcount *refcount, const char *reason) {
gpr_atm val = gpr_atm_no_barrier_load(&refcount->refs.count);
gpr_log(GPR_DEBUG, "%s %p:%p REF %" PRIdPTR "->%" PRIdPTR " %s",
refcount->object_type, refcount, refcount->destroy.cb_arg, val,
val + 1, reason);
#else
void grpc_stream_ref(grpc_stream_refcount *refcount) {
#endif
gpr_ref_non_zero(&refcount->refs);
}
#ifdef GRPC_STREAM_REFCOUNT_DEBUG
void grpc_stream_unref(grpc_exec_ctx *exec_ctx, grpc_stream_refcount *refcount,
const char *reason) {
gpr_atm val = gpr_atm_no_barrier_load(&refcount->refs.count);
gpr_log(GPR_DEBUG, "%s %p:%p UNREF %" PRIdPTR "->%" PRIdPTR " %s",
refcount->object_type, refcount, refcount->destroy.cb_arg, val,
val - 1, reason);
#else
void grpc_stream_unref(grpc_exec_ctx *exec_ctx,
grpc_stream_refcount *refcount) {
#endif
if (gpr_unref(&refcount->refs)) {
if (exec_ctx->flags & GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP) {
/* Ick.
The thread we're running on MAY be owned (indirectly) by a call-stack.
If that's the case, destroying the call-stack MAY try to destroy the
thread, which is a tangled mess that we just don't want to ever have to
cope with.
Throw this over to the executor (on a core-owned thread) and process it
there. */
refcount->destroy.scheduler = grpc_executor_scheduler;
}
grpc_closure_sched(exec_ctx, &refcount->destroy, GRPC_ERROR_NONE);
}
}
#ifdef GRPC_STREAM_REFCOUNT_DEBUG
void grpc_stream_ref_init(grpc_stream_refcount *refcount, int initial_refs,
grpc_iomgr_cb_func cb, void *cb_arg,
const char *object_type) {
refcount->object_type = object_type;
#else
void grpc_stream_ref_init(grpc_stream_refcount *refcount, int initial_refs,
grpc_iomgr_cb_func cb, void *cb_arg) {
#endif
gpr_ref_init(&refcount->refs, initial_refs);
grpc_closure_init(&refcount->destroy, cb, cb_arg, grpc_schedule_on_exec_ctx);
}
static void move64(uint64_t *from, uint64_t *to) {
*to += *from;
*from = 0;
}
void grpc_transport_move_one_way_stats(grpc_transport_one_way_stats *from,
grpc_transport_one_way_stats *to) {
move64(&from->framing_bytes, &to->framing_bytes);
move64(&from->data_bytes, &to->data_bytes);
move64(&from->header_bytes, &to->header_bytes);
}
void grpc_transport_move_stats(grpc_transport_stream_stats *from,
grpc_transport_stream_stats *to) {
grpc_transport_move_one_way_stats(&from->incoming, &to->incoming);
grpc_transport_move_one_way_stats(&from->outgoing, &to->outgoing);
}
size_t grpc_transport_stream_size(grpc_transport *transport) {
return transport->vtable->sizeof_stream;
}
void grpc_transport_destroy(grpc_exec_ctx *exec_ctx,
grpc_transport *transport) {
transport->vtable->destroy(exec_ctx, transport);
}
int grpc_transport_init_stream(grpc_exec_ctx *exec_ctx,
grpc_transport *transport, grpc_stream *stream,
grpc_stream_refcount *refcount,
const void *server_data) {
return transport->vtable->init_stream(exec_ctx, transport, stream, refcount,
server_data);
}
void grpc_transport_perform_stream_op(grpc_exec_ctx *exec_ctx,
grpc_transport *transport,
grpc_stream *stream,
grpc_transport_stream_op *op) {
transport->vtable->perform_stream_op(exec_ctx, transport, stream, op);
}
void grpc_transport_perform_op(grpc_exec_ctx *exec_ctx,
grpc_transport *transport,
grpc_transport_op *op) {
transport->vtable->perform_op(exec_ctx, transport, op);
}
void grpc_transport_set_pops(grpc_exec_ctx *exec_ctx, grpc_transport *transport,
grpc_stream *stream,
grpc_polling_entity *pollent) {
grpc_pollset *pollset;
grpc_pollset_set *pollset_set;
if ((pollset = grpc_polling_entity_pollset(pollent)) != NULL) {
transport->vtable->set_pollset(exec_ctx, transport, stream, pollset);
} else if ((pollset_set = grpc_polling_entity_pollset_set(pollent)) != NULL) {
transport->vtable->set_pollset_set(exec_ctx, transport, stream,
pollset_set);
} else {
abort();
}
}
void grpc_transport_destroy_stream(grpc_exec_ctx *exec_ctx,
grpc_transport *transport,
grpc_stream *stream, void *and_free_memory) {
transport->vtable->destroy_stream(exec_ctx, transport, stream,
and_free_memory);
}
char *grpc_transport_get_peer(grpc_exec_ctx *exec_ctx,
grpc_transport *transport) {
return transport->vtable->get_peer(exec_ctx, transport);
}
grpc_endpoint *grpc_transport_get_endpoint(grpc_exec_ctx *exec_ctx,
grpc_transport *transport) {
return transport->vtable->get_endpoint(exec_ctx, transport);
}
void grpc_transport_stream_op_finish_with_failure(grpc_exec_ctx *exec_ctx,
grpc_transport_stream_op *op,
grpc_error *error) {
grpc_closure_sched(exec_ctx, op->recv_message_ready, GRPC_ERROR_REF(error));
grpc_closure_sched(exec_ctx, op->recv_initial_metadata_ready,
GRPC_ERROR_REF(error));
grpc_closure_sched(exec_ctx, op->on_complete, error);
GRPC_ERROR_UNREF(op->cancel_error);
}
typedef struct {
grpc_closure outer_on_complete;
grpc_closure *inner_on_complete;
grpc_transport_op op;
} made_transport_op;
static void destroy_made_transport_op(grpc_exec_ctx *exec_ctx, void *arg,
grpc_error *error) {
made_transport_op *op = arg;
grpc_closure_sched(exec_ctx, op->inner_on_complete, GRPC_ERROR_REF(error));
gpr_free(op);
}
grpc_transport_op *grpc_make_transport_op(grpc_closure *on_complete) {
made_transport_op *op = gpr_malloc(sizeof(*op));
grpc_closure_init(&op->outer_on_complete, destroy_made_transport_op, op,
grpc_schedule_on_exec_ctx);
op->inner_on_complete = on_complete;
memset(&op->op, 0, sizeof(op->op));
op->op.on_consumed = &op->outer_on_complete;
return &op->op;
}
typedef struct {
grpc_closure outer_on_complete;
grpc_closure *inner_on_complete;
grpc_transport_stream_op op;
} made_transport_stream_op;
static void destroy_made_transport_stream_op(grpc_exec_ctx *exec_ctx, void *arg,
grpc_error *error) {
made_transport_stream_op *op = arg;
grpc_closure_sched(exec_ctx, op->inner_on_complete, GRPC_ERROR_REF(error));
gpr_free(op);
}
grpc_transport_stream_op *grpc_make_transport_stream_op(
grpc_closure *on_complete) {
made_transport_stream_op *op = gpr_malloc(sizeof(*op));
grpc_closure_init(&op->outer_on_complete, destroy_made_transport_stream_op,
op, grpc_schedule_on_exec_ctx);
op->inner_on_complete = on_complete;
memset(&op->op, 0, sizeof(op->op));
op->op.on_complete = &op->outer_on_complete;
return &op->op;
}
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