Merge pull request #469 from realm/sk-object-store-merge
Merge latest object store (includes Android async stuff)
This commit is contained in:
commit
6aa9825cd1
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@ -37,7 +37,8 @@ LOCAL_SRC_FILES := \
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src/object-store/src/impl/realm_coordinator.cpp \
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src/object-store/src/impl/results_notifier.cpp \
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src/object-store/src/impl/transact_log_handler.cpp \
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src/object-store/src/impl/generic/external_commit_helper.cpp \
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src/object-store/src/impl/android/external_commit_helper.cpp \
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src/object-store/src/impl/android/weak_realm_notifier.cpp \
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vendor/base64.cpp
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LOCAL_C_INCLUDES := src
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@ -9,5 +9,6 @@ cmake_install.cmake
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rules.ninja
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# Build products
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src/librealm-object-store.*
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src/librealm-object-store.dylib
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src/librealm-object-store-static.a
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tests/tests
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@ -13,7 +13,7 @@ include(RealmCore)
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set(REALM_CORE_VERSION "0.100.1" CACHE STRING "")
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use_realm_core(${REALM_CORE_VERSION})
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include_directories(${REALM_CORE_INCLUDE_DIR} src external/pegtl)
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set(PEGTL_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/external/pegtl)
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add_subdirectory(src)
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add_subdirectory(tests)
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@ -11,18 +11,23 @@ Cross-platform code used accross bindings. Binding developers can choose to use
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The object store's build system currently only suports building for OS X. The object store itself can build for all Apple
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platforms when integrated into a binding.
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1. Install CMake. You can download an installer for OS X from the [CMake download page](https://cmake.org/download/), or install via [Homebrew](http://brew.sh):
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1. Download PEGTL dependency
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```
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git submodule update --init
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```
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2. Install CMake. You can download an installer for OS X from the [CMake download page](https://cmake.org/download/), or install via [Homebrew](http://brew.sh):
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```
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brew install cmake
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```
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2. Generate build files:
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3. Generate build files:
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```
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cmake .
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```
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3. Build:
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4. Build:
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```
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make
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@ -55,5 +55,20 @@ else()
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impl/generic/external_commit_helper.hpp)
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endif()
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add_library(realm-object-store SHARED ${SOURCES} ${HEADERS})
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target_link_libraries(realm-object-store realm ${CF_LIBRARY})
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set(INCLUDE_DIRS ${REALM_CORE_INCLUDE_DIR} ${PEGTL_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
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# An object library to group together the compilation of the source files.
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add_library(realm-object-store-objects OBJECT ${SOURCES} ${HEADERS})
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add_dependencies(realm-object-store-objects realm)
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set_target_properties(realm-object-store-objects PROPERTIES POSITION_INDEPENDENT_CODE 1)
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target_include_directories(realm-object-store-objects PUBLIC ${INCLUDE_DIRS})
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# A static library, aggregating the prebuilt object files.
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add_library(realm-object-store-static STATIC $<TARGET_OBJECTS:realm-object-store-objects>)
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target_include_directories(realm-object-store-static PUBLIC ${INCLUDE_DIRS})
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target_link_libraries(realm-object-store-static PUBLIC realm ${CF_LIBRARY})
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# A dynamic library, linking together the prebuilt object files.
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add_library(realm-object-store SHARED $<TARGET_OBJECTS:realm-object-store-objects>)
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target_include_directories(realm-object-store PUBLIC ${INCLUDE_DIRS})
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target_link_libraries(realm-object-store PRIVATE realm ${CF_LIBRARY})
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@ -0,0 +1,201 @@
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////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2016 Realm Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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||||
// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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||||
//
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||||
// 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.
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||||
//
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||||
////////////////////////////////////////////////////////////////////////////
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||||
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||||
#include "impl/external_commit_helper.hpp"
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#include "impl/realm_coordinator.hpp"
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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||||
#include <sstream>
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#include <sys/epoll.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <system_error>
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#include <unistd.h>
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#ifdef __ANDROID__
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#include <android/log.h>
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||||
#define ANDROID_LOG __android_log_print
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||||
#else
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||||
#define ANDROID_LOG(...)
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||||
#endif
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using namespace realm;
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||||
using namespace realm::_impl;
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||||
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||||
#define LOGE(fmt...) do { \
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fprintf(stderr, fmt); \
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||||
ANDROID_LOG(ANDROID_LOG_ERROR, "REALM", fmt); \
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||||
} while (0)
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|
||||
namespace {
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||||
// Write a byte to a pipe to notify anyone waiting for data on the pipe
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||||
void notify_fd(int fd)
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||||
{
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||||
while (true) {
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||||
char c = 0;
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||||
ssize_t ret = write(fd, &c, 1);
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||||
if (ret == 1) {
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||||
break;
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||||
}
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||||
// If the pipe's buffer is full, we need to read some of the old data in
|
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// it to make space. We don't just read in the code waiting for
|
||||
// notifications so that we can notify multiple waiters with a single
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// write.
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assert(ret == -1 && errno == EAGAIN);
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char buff[1024];
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read(fd, buff, sizeof buff);
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||||
}
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||||
}
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} // anonymous namespace
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||||
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||||
void ExternalCommitHelper::FdHolder::close()
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{
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||||
if (m_fd != -1) {
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||||
::close(m_fd);
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||||
}
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||||
m_fd = -1;
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||||
}
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||||
ExternalCommitHelper::ExternalCommitHelper(RealmCoordinator& parent)
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: m_parent(parent)
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{
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||||
m_epfd = epoll_create(1);
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if (m_epfd == -1) {
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throw std::system_error(errno, std::system_category());
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||||
}
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||||
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||||
auto path = parent.get_path() + ".note";
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||||
// Create and open the named pipe
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int ret = mkfifo(path.c_str(), 0600);
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||||
if (ret == -1) {
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||||
int err = errno;
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||||
if (err == ENOTSUP) {
|
||||
// Filesystem doesn't support named pipes, so try putting it in tmp instead
|
||||
// Hash collisions are okay here because they just result in doing
|
||||
// extra work, as opposed to correctness problems
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std::ostringstream ss;
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||||
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||||
std::string tmp_dir(getenv("TMPDIR"));
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ss << tmp_dir;
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if (tmp_dir.back() != '/')
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ss << '/';
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ss << "realm_" << std::hash<std::string>()(path) << ".note";
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||||
path = ss.str();
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||||
ret = mkfifo(path.c_str(), 0600);
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err = errno;
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||||
}
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||||
// the fifo already existing isn't an error
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if (ret == -1 && err != EEXIST) {
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||||
throw std::system_error(err, std::system_category());
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||||
}
|
||||
}
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||||
|
||||
m_notify_fd = open(path.c_str(), O_RDWR);
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||||
if (m_notify_fd == -1) {
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throw std::system_error(errno, std::system_category());
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||||
}
|
||||
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||||
// Make writing to the pipe return -1 when the pipe's buffer is full
|
||||
// rather than blocking until there's space available
|
||||
ret = fcntl(m_notify_fd, F_SETFL, O_NONBLOCK);
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||||
if (ret == -1) {
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||||
throw std::system_error(errno, std::system_category());
|
||||
}
|
||||
|
||||
// Create the anonymous pipe
|
||||
int pipe_fd[2];
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ret = pipe(pipe_fd);
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if (ret == -1) {
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||||
throw std::system_error(errno, std::system_category());
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}
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m_shutdown_read_fd = pipe_fd[0];
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m_shutdown_write_fd = pipe_fd[1];
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||||
m_thread = std::thread([=] {
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||||
try {
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listen();
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}
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catch (std::exception const& e) {
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LOGE("uncaught exception in notifier thread: %s: %s\n", typeid(e).name(), e.what());
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throw;
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}
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catch (...) {
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LOGE("uncaught exception in notifier thread\n");
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throw;
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||||
}
|
||||
});
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||||
}
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ExternalCommitHelper::~ExternalCommitHelper()
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||||
{
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||||
notify_fd(m_shutdown_write_fd);
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||||
m_thread.join(); // Wait for the thread to exit
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}
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void ExternalCommitHelper::listen()
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{
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pthread_setname_np(pthread_self(), "Realm notification listener");
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int ret;
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|
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struct epoll_event event[2];
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event[0].events = EPOLLIN | EPOLLET;
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event[0].data.fd = m_notify_fd;
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ret = epoll_ctl(m_epfd, EPOLL_CTL_ADD, m_notify_fd, &event[0]);
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assert(ret == 0);
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||||
event[1].events = EPOLLIN;
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event[1].data.fd = m_shutdown_read_fd;
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ret = epoll_ctl(m_epfd, EPOLL_CTL_ADD, m_shutdown_read_fd, &event[1]);
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assert(ret == 0);
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while (true) {
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||||
struct epoll_event ev;
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ret = epoll_wait(m_epfd, &ev, 1, -1);
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||||
if (ret == -1 && errno == EINTR) {
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||||
// Interrupted system call, try again.
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continue;
|
||||
}
|
||||
|
||||
assert(ret >= 0);
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||||
if (ret == 0) {
|
||||
// Spurious wakeup; just wait again
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continue;
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||||
}
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||||
|
||||
if (ev.data.u32 == (uint32_t)m_shutdown_read_fd) {
|
||||
return;
|
||||
}
|
||||
assert(ev.data.u32 == (uint32_t)m_notify_fd);
|
||||
|
||||
m_parent.on_change();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void ExternalCommitHelper::notify_others()
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||||
{
|
||||
notify_fd(m_notify_fd);
|
||||
}
|
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@ -0,0 +1,76 @@
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////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Copyright 2016 Realm Inc.
|
||||
//
|
||||
// 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 <thread>
|
||||
|
||||
namespace realm {
|
||||
|
||||
namespace _impl {
|
||||
class RealmCoordinator;
|
||||
|
||||
class ExternalCommitHelper {
|
||||
public:
|
||||
ExternalCommitHelper(RealmCoordinator& parent);
|
||||
~ExternalCommitHelper();
|
||||
|
||||
void notify_others();
|
||||
|
||||
private:
|
||||
// A RAII holder for a file descriptor which automatically closes the wrapped
|
||||
// fd when it's deallocated
|
||||
class FdHolder {
|
||||
public:
|
||||
FdHolder() = default;
|
||||
~FdHolder() { close(); }
|
||||
operator int() const { return m_fd; }
|
||||
|
||||
FdHolder& operator=(int new_fd) {
|
||||
close();
|
||||
m_fd = new_fd;
|
||||
return *this;
|
||||
}
|
||||
|
||||
private:
|
||||
int m_fd = -1;
|
||||
void close();
|
||||
|
||||
FdHolder& operator=(FdHolder const&) = delete;
|
||||
FdHolder(FdHolder const&) = delete;
|
||||
};
|
||||
|
||||
void listen();
|
||||
|
||||
RealmCoordinator& m_parent;
|
||||
|
||||
// The listener thread
|
||||
std::thread m_thread;
|
||||
|
||||
// Read-write file descriptor for the named pipe which is waited on for
|
||||
// changes and written to when a commit is made
|
||||
FdHolder m_notify_fd;
|
||||
// File descriptor for epoll
|
||||
FdHolder m_epfd;
|
||||
// The two ends of an anonymous pipe used to notify the kqueue() thread that
|
||||
// it should be shut down.
|
||||
FdHolder m_shutdown_read_fd;
|
||||
FdHolder m_shutdown_write_fd;
|
||||
};
|
||||
|
||||
} // namespace _impl
|
||||
} // namespace realm
|
||||
|
|
@ -0,0 +1,143 @@
|
|||
////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Copyright 2016 Realm Inc.
|
||||
//
|
||||
// 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 "impl/weak_realm_notifier.hpp"
|
||||
#include "shared_realm.hpp"
|
||||
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
#include <android/log.h>
|
||||
#include <android/looper.h>
|
||||
|
||||
#define LOGE(fmt...) do { \
|
||||
fprintf(stderr, fmt); \
|
||||
__android_log_print(ANDROID_LOG_ERROR, "REALM", fmt); \
|
||||
} while (0)
|
||||
|
||||
namespace realm {
|
||||
namespace _impl {
|
||||
|
||||
WeakRealmNotifier::WeakRealmNotifier(const std::shared_ptr<Realm>& realm, bool cache)
|
||||
: WeakRealmNotifierBase(realm, cache)
|
||||
, m_thread_has_looper(false)
|
||||
{
|
||||
ALooper* looper = ALooper_forThread();
|
||||
if (!looper) {
|
||||
return;
|
||||
}
|
||||
|
||||
int message_pipe[2];
|
||||
if (pipe2(message_pipe, O_CLOEXEC | O_NONBLOCK)) {
|
||||
LOGE("could not create WeakRealmNotifier ALooper message pipe: %s", strerror(errno));
|
||||
return;
|
||||
}
|
||||
|
||||
if (ALooper_addFd(looper, message_pipe[0], 3 /* LOOPER_ID_USER */, ALOOPER_EVENT_INPUT | ALOOPER_EVENT_HANGUP, &looper_callback, nullptr) != 1) {
|
||||
LOGE("Error adding WeakRealmNotifier callback to looper.");
|
||||
::close(message_pipe[0]);
|
||||
::close(message_pipe[1]);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
m_message_pipe.read = message_pipe[0];
|
||||
m_message_pipe.write = message_pipe[1];
|
||||
m_thread_has_looper = true;
|
||||
}
|
||||
|
||||
WeakRealmNotifier::WeakRealmNotifier(WeakRealmNotifier&& rgt)
|
||||
: WeakRealmNotifierBase(std::move(rgt))
|
||||
, m_message_pipe(std::move(rgt.m_message_pipe))
|
||||
{
|
||||
bool flag = true;
|
||||
m_thread_has_looper = rgt.m_thread_has_looper.compare_exchange_strong(flag, false);
|
||||
}
|
||||
|
||||
WeakRealmNotifier& WeakRealmNotifier::operator=(WeakRealmNotifier&& rgt)
|
||||
{
|
||||
close();
|
||||
|
||||
WeakRealmNotifierBase::operator=(std::move(rgt));
|
||||
m_message_pipe = std::move(rgt.m_message_pipe);
|
||||
|
||||
bool flag = true;
|
||||
m_thread_has_looper = rgt.m_thread_has_looper.compare_exchange_strong(flag, false);
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
void WeakRealmNotifier::close()
|
||||
{
|
||||
bool flag = true;
|
||||
if (m_thread_has_looper.compare_exchange_strong(flag, false)) {
|
||||
// closing one end of the pipe here will trigger ALOOPER_EVENT_HANGUP in the callback
|
||||
// which will do the rest of the cleanup
|
||||
::close(m_message_pipe.write);
|
||||
}
|
||||
}
|
||||
|
||||
void WeakRealmNotifier::notify()
|
||||
{
|
||||
if (m_thread_has_looper && !expired()) {
|
||||
|
||||
// we need to pass the weak Realm pointer to the other thread.
|
||||
// to do so we allocate a weak pointer on the heap and send its address over a pipe.
|
||||
// the other end of the pipe is read by the realm thread. when it's done with the pointer, it deletes it.
|
||||
auto realm_ptr = new std::weak_ptr<Realm>(realm());
|
||||
if (write(m_message_pipe.write, &realm_ptr, sizeof(realm_ptr)) != sizeof(realm_ptr)) {
|
||||
delete realm_ptr;
|
||||
LOGE("Buffer overrun when writing to WeakRealmNotifier's ALooper message pipe.");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int WeakRealmNotifier::looper_callback(int fd, int events, void* data)
|
||||
{
|
||||
if ((events & ALOOPER_EVENT_INPUT) != 0) {
|
||||
// this is a pointer to a heap-allocated weak Realm pointer created by the notifiying thread.
|
||||
// the actual address to the pointer is communicated over a pipe.
|
||||
// we have to delete it so as to not leak, using the same memory allocation facilities it was allocated with.
|
||||
std::weak_ptr<Realm>* realm_ptr = nullptr;
|
||||
while (read(fd, &realm_ptr, sizeof(realm_ptr)) == sizeof(realm_ptr)) {
|
||||
if (auto realm = realm_ptr->lock()) {
|
||||
if (!realm->is_closed()) {
|
||||
realm->notify();
|
||||
}
|
||||
}
|
||||
|
||||
delete realm_ptr;
|
||||
}
|
||||
}
|
||||
|
||||
if ((events & ALOOPER_EVENT_HANGUP) != 0) {
|
||||
// this callback is always invoked on the looper thread so it's fine to get the looper like this
|
||||
ALooper_removeFd(ALooper_forThread(), fd);
|
||||
::close(fd);
|
||||
}
|
||||
|
||||
if ((events & ALOOPER_EVENT_ERROR) != 0) {
|
||||
LOGE("Unexpected error on WeakRealmNotifier's ALooper message pipe.");
|
||||
}
|
||||
|
||||
// return 1 to continue receiving events
|
||||
return 1;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
|
@ -0,0 +1,58 @@
|
|||
////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Copyright 2016 Realm Inc.
|
||||
//
|
||||
// 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 "impl/weak_realm_notifier_base.hpp"
|
||||
|
||||
#include <atomic>
|
||||
|
||||
namespace realm {
|
||||
class Realm;
|
||||
|
||||
namespace _impl {
|
||||
|
||||
class WeakRealmNotifier : public WeakRealmNotifierBase {
|
||||
public:
|
||||
WeakRealmNotifier(const std::shared_ptr<Realm>& realm, bool cache);
|
||||
~WeakRealmNotifier() { close(); }
|
||||
|
||||
WeakRealmNotifier(WeakRealmNotifier&&);
|
||||
WeakRealmNotifier& operator=(WeakRealmNotifier&&);
|
||||
|
||||
WeakRealmNotifier(const WeakRealmNotifier&) = delete;
|
||||
WeakRealmNotifier& operator=(const WeakRealmNotifier&) = delete;
|
||||
|
||||
// Asyncronously call notify() on the Realm on the appropriate thread
|
||||
void notify();
|
||||
|
||||
private:
|
||||
void close();
|
||||
|
||||
static int looper_callback(int fd, int events, void* data);
|
||||
|
||||
std::atomic<bool> m_thread_has_looper;
|
||||
|
||||
// pipe file descriptor pair we use to signal ALooper
|
||||
struct {
|
||||
int read = -1;
|
||||
int write = -1;
|
||||
} m_message_pipe;
|
||||
};
|
||||
|
||||
} // namespace _impl
|
||||
} // namespace realm
|
||||
|
|
@ -23,6 +23,8 @@
|
|||
|
||||
#if REALM_PLATFORM_APPLE
|
||||
#include "impl/apple/external_commit_helper.hpp"
|
||||
#elif REALM_ANDROID
|
||||
#include "impl/android/external_commit_helper.hpp"
|
||||
#else
|
||||
#include "impl/generic/external_commit_helper.hpp"
|
||||
#endif
|
||||
|
|
|
@ -25,6 +25,8 @@
|
|||
#include "impl/node/weak_realm_notifier.hpp"
|
||||
#elif REALM_PLATFORM_APPLE
|
||||
#include "impl/apple/weak_realm_notifier.hpp"
|
||||
#elif REALM_ANDROID
|
||||
#include "impl/android/weak_realm_notifier.hpp"
|
||||
#else
|
||||
#include "impl/generic/weak_realm_notifier.hpp"
|
||||
#endif
|
||||
|
|
|
@ -40,7 +40,7 @@ public:
|
|||
std::shared_ptr<Realm> realm() const { return m_realm.lock(); }
|
||||
|
||||
// Does this WeakRealmNotifierBase store a Realm instance that should be used on the current thread?
|
||||
bool is_cached_for_current_thread() const { return m_cache && m_thread_id == std::this_thread::get_id(); }
|
||||
bool is_cached_for_current_thread() const { return m_cache && is_for_current_thread(); }
|
||||
|
||||
// Has the Realm instance been destroyed?
|
||||
bool expired() const { return m_realm.expired(); }
|
||||
|
@ -48,6 +48,8 @@ public:
|
|||
// Is this a WeakRealmNotifierBase for the given Realm instance?
|
||||
bool is_for_realm(Realm* realm) const { return realm == m_realm_key; }
|
||||
|
||||
bool is_for_current_thread() const { return m_thread_id == std::this_thread::get_id(); }
|
||||
|
||||
private:
|
||||
std::weak_ptr<Realm> m_realm;
|
||||
std::thread::id m_thread_id = std::this_thread::get_id();
|
||||
|
|
|
@ -135,6 +135,8 @@ namespace realm {
|
|||
// Realm after closing it will produce undefined behavior.
|
||||
void close();
|
||||
|
||||
bool is_closed() { return !m_read_only_group && !m_shared_group; }
|
||||
|
||||
~Realm();
|
||||
|
||||
void init(std::shared_ptr<_impl::RealmCoordinator> coordinator);
|
||||
|
|
Loading…
Reference in New Issue