diff options
Diffstat (limited to 'src/core/ext/load_reporting/load_reporting.c')
-rw-r--r-- | src/core/ext/load_reporting/load_reporting.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/core/ext/load_reporting/load_reporting.c b/src/core/ext/load_reporting/load_reporting.c new file mode 100644 index 0000000000..9081ffce15 --- /dev/null +++ b/src/core/ext/load_reporting/load_reporting.c @@ -0,0 +1,101 @@ +/* + * + * Copyright 2016, 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 <limits.h> +#include <string.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/sync.h> + +#include "src/core/ext/load_reporting/load_reporting.h" +#include "src/core/ext/load_reporting/load_reporting_filter.h" +#include "src/core/lib/channel/channel_stack_builder.h" +#include "src/core/lib/surface/channel_init.h" + +struct grpc_load_reporting_data { + grpc_load_reporting_fn fn; + void *data; +}; + +grpc_load_reporting_data *grpc_load_reporting_create(grpc_load_reporting_fn fn, + void *data) { + grpc_load_reporting_data *lrd = gpr_malloc(sizeof(grpc_load_reporting_data)); + lrd->fn = fn; + lrd->data = data; + return lrd; +} + +void grpc_load_reporting_destroy(grpc_load_reporting_data *lrd) { + gpr_free(lrd); +} + +void grpc_load_reporting_call(grpc_load_reporting_data *lrd, + const grpc_call_stats *stats) { + if (lrd->fn != NULL) { + lrd->fn(lrd->data, stats); + } +} + +static bool is_load_reporting_enabled(const grpc_channel_args *a) { + if (a == NULL) return false; + for (size_t i = 0; i < a->num_args; i++) { + if (0 == strcmp(a->args[i].key, GRPC_ARG_ENABLE_LOAD_REPORTING)) { + return a->args[i].value.pointer.p != NULL; + } + } + return false; +} + +static bool maybe_add_load_reporting_filter(grpc_channel_stack_builder *builder, + void *arg) { + const grpc_channel_args *args = + grpc_channel_stack_builder_get_channel_arguments(builder); + if (is_load_reporting_enabled(args)) { + return grpc_channel_stack_builder_prepend_filter( + builder, (const grpc_channel_filter *)arg, NULL, NULL); + } + return true; +} + +/* Plugin registration */ + +void grpc_load_reporting_plugin_init(void) { + grpc_channel_init_register_stage(GRPC_CLIENT_CHANNEL, INT_MAX, + maybe_add_load_reporting_filter, + (void *)&grpc_load_reporting_filter); + grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX, + maybe_add_load_reporting_filter, + (void *)&grpc_load_reporting_filter); +} + +void grpc_load_reporting_plugin_shutdown() {} |