diff options
author | 2017-10-05 16:10:01 -0700 | |
---|---|---|
committer | 2017-10-05 16:10:01 -0700 | |
commit | e624c2daa47a59aee3eb8c27162d4675b66bf64d (patch) | |
tree | a1ce11418d40dec16f74ce0373b463095ef8a36c /src/core/lib/iomgr/ev_posix.cc | |
parent | 7b2484b380a061626010467efe5c24db83dc3db6 (diff) | |
parent | 998c30dab22b1fb7e15a9b01559a100ea9fdbed3 (diff) |
Merge github.com:grpc/grpc into epexinf
Diffstat (limited to 'src/core/lib/iomgr/ev_posix.cc')
-rw-r--r-- | src/core/lib/iomgr/ev_posix.cc | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/ev_posix.cc b/src/core/lib/iomgr/ev_posix.cc new file mode 100644 index 0000000000..80269881cb --- /dev/null +++ b/src/core/lib/iomgr/ev_posix.cc @@ -0,0 +1,264 @@ +/* + * + * Copyright 2015 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +#include "src/core/lib/iomgr/port.h" + +#ifdef GRPC_POSIX_SOCKET + +#include "src/core/lib/iomgr/ev_posix.h" + +#include <string.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/log.h> +#include <grpc/support/string_util.h> +#include <grpc/support/useful.h> + +#include "src/core/lib/debug/trace.h" +#include "src/core/lib/iomgr/ev_epoll1_linux.h" +#include "src/core/lib/iomgr/ev_epollex_linux.h" +#include "src/core/lib/iomgr/ev_epollsig_linux.h" +#include "src/core/lib/iomgr/ev_poll_posix.h" +#include "src/core/lib/support/env.h" + +grpc_tracer_flag grpc_polling_trace = + GRPC_TRACER_INITIALIZER(false, "polling"); /* Disabled by default */ + +#ifndef NDEBUG +grpc_tracer_flag grpc_trace_fd_refcount = + GRPC_TRACER_INITIALIZER(false, "fd_refcount"); +#endif + +/** Default poll() function - a pointer so that it can be overridden by some + * tests */ +grpc_poll_function_type grpc_poll_function = poll; + +grpc_wakeup_fd grpc_global_wakeup_fd; + +static const grpc_event_engine_vtable *g_event_engine; +static const char *g_poll_strategy_name = NULL; + +typedef const grpc_event_engine_vtable *(*event_engine_factory_fn)( + bool explicit_request); + +typedef struct { + const char *name; + event_engine_factory_fn factory; +} event_engine_factory; + +static const event_engine_factory g_factories[] = { + {"epollex", grpc_init_epollex_linux}, {"epoll1", grpc_init_epoll1_linux}, + {"epollsig", grpc_init_epollsig_linux}, {"poll", grpc_init_poll_posix}, + {"poll-cv", grpc_init_poll_cv_posix}, +}; + +static void add(const char *beg, const char *end, char ***ss, size_t *ns) { + size_t n = *ns; + size_t np = n + 1; + char *s; + size_t len; + GPR_ASSERT(end >= beg); + len = (size_t)(end - beg); + s = (char *)gpr_malloc(len + 1); + memcpy(s, beg, len); + s[len] = 0; + *ss = (char **)gpr_realloc(*ss, sizeof(char **) * np); + (*ss)[n] = s; + *ns = np; +} + +static void split(const char *s, char ***ss, size_t *ns) { + const char *c = strchr(s, ','); + if (c == NULL) { + add(s, s + strlen(s), ss, ns); + } else { + add(s, c, ss, ns); + split(c + 1, ss, ns); + } +} + +static bool is(const char *want, const char *have) { + return 0 == strcmp(want, "all") || 0 == strcmp(want, have); +} + +static void try_engine(const char *engine) { + for (size_t i = 0; i < GPR_ARRAY_SIZE(g_factories); i++) { + if (is(engine, g_factories[i].name)) { + if ((g_event_engine = g_factories[i].factory( + 0 == strcmp(engine, g_factories[i].name)))) { + g_poll_strategy_name = g_factories[i].name; + gpr_log(GPR_DEBUG, "Using polling engine: %s", g_factories[i].name); + return; + } + } + } +} + +/* This should be used for testing purposes ONLY */ +void grpc_set_event_engine_test_only( + const grpc_event_engine_vtable *ev_engine) { + g_event_engine = ev_engine; +} + +const grpc_event_engine_vtable *grpc_get_event_engine_test_only() { + return g_event_engine; +} + +/* Call this only after calling grpc_event_engine_init() */ +const char *grpc_get_poll_strategy_name() { return g_poll_strategy_name; } + +void grpc_event_engine_init(void) { + grpc_register_tracer(&grpc_polling_trace); + + char *s = gpr_getenv("GRPC_POLL_STRATEGY"); + if (s == NULL) { + s = gpr_strdup("all"); + } + + char **strings = NULL; + size_t nstrings = 0; + split(s, &strings, &nstrings); + + for (size_t i = 0; g_event_engine == NULL && i < nstrings; i++) { + try_engine(strings[i]); + } + + for (size_t i = 0; i < nstrings; i++) { + gpr_free(strings[i]); + } + gpr_free(strings); + gpr_free(s); + + if (g_event_engine == NULL) { + gpr_log(GPR_ERROR, "No event engine could be initialized"); + abort(); + } +} + +void grpc_event_engine_shutdown(void) { + g_event_engine->shutdown_engine(); + g_event_engine = NULL; +} + +grpc_fd *grpc_fd_create(int fd, const char *name) { + return g_event_engine->fd_create(fd, name); +} + +int grpc_fd_wrapped_fd(grpc_fd *fd) { + return g_event_engine->fd_wrapped_fd(fd); +} + +void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done, + int *release_fd, bool already_closed, const char *reason) { + g_event_engine->fd_orphan(exec_ctx, fd, on_done, release_fd, already_closed, + reason); +} + +void grpc_fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_error *why) { + g_event_engine->fd_shutdown(exec_ctx, fd, why); +} + +bool grpc_fd_is_shutdown(grpc_fd *fd) { + return g_event_engine->fd_is_shutdown(fd); +} + +void grpc_fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd, + grpc_closure *closure) { + g_event_engine->fd_notify_on_read(exec_ctx, fd, closure); +} + +void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd, + grpc_closure *closure) { + g_event_engine->fd_notify_on_write(exec_ctx, fd, closure); +} + +size_t grpc_pollset_size(void) { return g_event_engine->pollset_size; } + +void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu) { + g_event_engine->pollset_init(pollset, mu); +} + +void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, + grpc_closure *closure) { + g_event_engine->pollset_shutdown(exec_ctx, pollset, closure); +} + +void grpc_pollset_destroy(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) { + g_event_engine->pollset_destroy(exec_ctx, pollset); +} + +grpc_error *grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, + grpc_pollset_worker **worker, gpr_timespec now, + gpr_timespec deadline) { + return g_event_engine->pollset_work(exec_ctx, pollset, worker, now, deadline); +} + +grpc_error *grpc_pollset_kick(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, + grpc_pollset_worker *specific_worker) { + return g_event_engine->pollset_kick(exec_ctx, pollset, specific_worker); +} + +void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, + struct grpc_fd *fd) { + g_event_engine->pollset_add_fd(exec_ctx, pollset, fd); +} + +grpc_pollset_set *grpc_pollset_set_create(void) { + return g_event_engine->pollset_set_create(); +} + +void grpc_pollset_set_destroy(grpc_exec_ctx *exec_ctx, + grpc_pollset_set *pollset_set) { + g_event_engine->pollset_set_destroy(exec_ctx, pollset_set); +} + +void grpc_pollset_set_add_pollset(grpc_exec_ctx *exec_ctx, + grpc_pollset_set *pollset_set, + grpc_pollset *pollset) { + g_event_engine->pollset_set_add_pollset(exec_ctx, pollset_set, pollset); +} + +void grpc_pollset_set_del_pollset(grpc_exec_ctx *exec_ctx, + grpc_pollset_set *pollset_set, + grpc_pollset *pollset) { + g_event_engine->pollset_set_del_pollset(exec_ctx, pollset_set, pollset); +} + +void grpc_pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx, + grpc_pollset_set *bag, + grpc_pollset_set *item) { + g_event_engine->pollset_set_add_pollset_set(exec_ctx, bag, item); +} + +void grpc_pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx, + grpc_pollset_set *bag, + grpc_pollset_set *item) { + g_event_engine->pollset_set_del_pollset_set(exec_ctx, bag, item); +} + +void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx, + grpc_pollset_set *pollset_set, grpc_fd *fd) { + g_event_engine->pollset_set_add_fd(exec_ctx, pollset_set, fd); +} + +void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx, + grpc_pollset_set *pollset_set, grpc_fd *fd) { + g_event_engine->pollset_set_del_fd(exec_ctx, pollset_set, fd); +} + +#endif // GRPC_POSIX_SOCKET |