mirror of https://github.com/grpc/grpc.git
This adds support for eventfd based kicking, with the skeleton of support for runtime selection between eventfds and pipes.pull/157/head
David Klempner
10 years ago
parent
85eea08ba8
commit
dbb4f942d0
11 changed files with 270 additions and 78 deletions
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/*
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* |
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* Copyright 2015, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include "src/core/iomgr/pollset_kick_eventfd.h" |
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#ifdef GPR_LINUX_EVENTFD |
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#include <errno.h> |
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#include <sys/eventfd.h> |
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#include <unistd.h> |
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#include <grpc/support/port_platform.h> |
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#include <grpc/support/log.h> |
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static void eventfd_create(grpc_kick_fd_info *fd_info) { |
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int efd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); |
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/* TODO(klempner): Handle failure more gracefully */ |
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GPR_ASSERT(efd >= 0); |
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fd_info->read_fd = efd; |
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fd_info->write_fd = -1; |
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} |
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static void eventfd_consume(grpc_kick_fd_info *fd_info) { |
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eventfd_t value; |
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int err; |
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do { |
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err = eventfd_read(fd_info->read_fd, &value); |
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} while (err < 0 && errno == EINTR); |
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} |
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static void eventfd_kick(grpc_kick_fd_info *fd_info) { |
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int err; |
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do { |
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err = eventfd_write(fd_info->read_fd, 1); |
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} while (err < 0 && errno == EINTR); |
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} |
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static void eventfd_destroy(grpc_kick_fd_info *fd_info) { |
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close(fd_info->read_fd); |
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} |
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static const grpc_pollset_kick_vtable eventfd_kick_vtable = { |
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eventfd_create, eventfd_consume, eventfd_kick, eventfd_destroy |
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}; |
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const grpc_pollset_kick_vtable *grpc_pollset_kick_eventfd_init(void) { |
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/* TODO(klempner): Check that eventfd works */ |
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return &eventfd_kick_vtable; |
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} |
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#else /* GPR_LINUX_EVENTFD not defined */ |
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const grpc_pollset_kick_vtable *grpc_pollset_kick_eventfd_init(void) { |
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return NULL; |
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} |
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#endif /* GPR_LINUX_EVENTFD */ |
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@ -0,0 +1,42 @@ |
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/*
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* |
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* Copyright 2015, Google Inc. |
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* All rights reserved. |
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* |
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* 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. |
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* * 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. |
||||
* |
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* 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 |
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* 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 |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#ifndef __GRPC_INTERNAL_IOMGR_POLLSET_KICK_EVENTFD_H_ |
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#define __GRPC_INTERNAL_IOMGR_POLLSET_KICK_EVENTFD_H_ |
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#include "src/core/iomgr/pollset_kick_posix.h" |
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/* Tries to enable eventfd support, returns a kick vtable if successful. */ |
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const grpc_pollset_kick_vtable *grpc_pollset_kick_eventfd_init(void); |
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#endif /* __GRPC_INTERNAL_IOMGR_POLLSET_KICK_EVENTFD_H_ */ |
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