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Shuffle stuff around and clean some things up

This commit is contained in:
Thomas Goyne 2015-09-02 13:51:28 -07:00
parent eeb2ddd794
commit b129ebe8c1
6 changed files with 441 additions and 354 deletions
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40
index_set.cpp
View File

@ -20,16 +20,7 @@
using namespace realm;
size_t IndexSet::size() const
{
size_t size = 0;
for (auto const& range : m_ranges) {
size += range.second - range.first;
}
return size;
}
std::vector<IndexSet::Range>::iterator IndexSet::find(size_t index)
IndexSet::iterator IndexSet::find(size_t index)
{
for (auto it = m_ranges.begin(), end = m_ranges.end(); it != end; ++it) {
if (it->second > index)
@ -43,14 +34,14 @@ void IndexSet::add(size_t index)
do_add(find(index), index);
}
void IndexSet::do_add(std::vector<Range>::iterator it, size_t index)
void IndexSet::do_add(iterator it, size_t index)
{
bool more_before = it != m_ranges.begin(), valid = it != m_ranges.end();
if (valid && it->first <= index && it->second > index) {
// index is already in set
}
else if (more_before && (it - 1)->second == index) {
// index is immediate after an existing range
// index is immediately after an existing range
++(it - 1)->second;
}
else if (more_before && valid && (it - 1)->second == it->first) {
@ -99,28 +90,3 @@ void IndexSet::add_shifted(size_t index)
}
do_add(it, index);
}
size_t IndexSet::iterator::operator*() const
{
return m_data->first + m_offset;
}
IndexSet::iterator& IndexSet::iterator::operator++()
{
++m_offset;
if (m_offset + m_data->first == m_data->second) {
++m_data;
m_offset = 0;
}
return *this;
}
bool IndexSet::iterator::operator==(iterator other) const
{
return m_data == other.m_data && m_offset == other.m_offset;
}
bool IndexSet::iterator::operator!=(iterator other) const
{
return m_data != other.m_data || m_offset != other.m_offset;
}

42
index_set.hpp
View File

@ -24,40 +24,38 @@
namespace realm {
class IndexSet {
public:
struct iterator {
size_t operator*() const;
iterator& operator++();
bool operator==(iterator) const;
bool operator!=(iterator) const;
using value_type = std::pair<size_t, size_t>;
using iterator = std::vector<value_type>::iterator;
using const_iterator = std::vector<value_type>::const_iterator;
iterator(std::pair<size_t, size_t>* data) noexcept : m_data(data) { }
private:
std::pair<size_t, size_t>* m_data;
size_t m_offset = 0;
};
iterator begin() { return iterator(&m_ranges[0]); }
iterator end() { return iterator(&m_ranges[m_ranges.size()]); }
size_t size() const;
const_iterator begin() const { return m_ranges.begin(); }
const_iterator end() const { return m_ranges.end(); }
bool empty() const { return m_ranges.empty(); }
size_t size() const { return m_ranges.size(); }
// Add an index to the set, doing nothing if it's already present
void add(size_t index);
// Set the index set to a single range starting at 0 with length `len`
// Remove all indexes from the set and then add a single range starting from
// zero with the given length
void set(size_t len);
// Insert an index at the given position, shifting existing indexes back
// Insert an index at the given position, shifting existing indexes at or
// after that point back by one
void insert_at(size_t index);
// Add an index which has had all of the ranges in the set before it removed
void add_shifted(size_t index);
private:
using Range = std::pair<size_t, size_t>;
std::vector<Range> m_ranges;
std::vector<value_type> m_ranges;
// Find the range which contains the index, or the first one after it if
// none do
std::vector<Range>::iterator find(size_t index);
void do_add(std::vector<Range>::iterator pos, size_t index);
iterator find(size_t index);
// Insert the index before the given position, combining existing ranges as
// applicable
void do_add(iterator pos, size_t index);
};
} // namespace realm

22
realm_delegate.hpp
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@ -29,6 +29,7 @@ class RealmDelegate {
public:
virtual ~RealmDelegate() = default;
// Change information for a single field of a row
struct ColumnInfo {
bool changed = false;
enum class Kind {
@ -41,10 +42,19 @@ public:
IndexSet indices;
};
// Information about an observed row in a table
struct ObserverState {
// Initial table and row which is observed
// May be updated by row insertions and removals
size_t table_ndx;
size_t row_ndx;
void* info; // opaque user info
// Opaque userdata for the delegate's use
void* info;
// Populated with information about which columns were changed
// May be shorter than the actual number of columns if the later columns
// are not modified
std::vector<ColumnInfo> changes;
// Simple lexographic ordering
@ -68,10 +78,16 @@ public:
// The Realm's read version will change
// Only called if get_observed_row() returned a non-empty array.
virtual void will_change(std::vector<ObserverState> const&, std::vector<void*> const&) = 0;
// observers is the vector returned from get_observed_rows()
// invalidated is the `info` pointers for each observed object which was deleted
virtual void will_change(std::vector<ObserverState> const& observers,
std::vector<void*> const& invalidated) = 0;
// The Realm's read version has changed
virtual void did_change(std::vector<ObserverState> const&, std::vector<void*> const&) = 0;
// observers is the vector returned from get_observed_rows()
// invalidated is the `info` pointers for each observed object which was deleted
virtual void did_change(std::vector<ObserverState> const& observers,
std::vector<void*> const& invalidated) = 0;
};
} // namespace realm

298
shared_realm.cpp
View File

@ -19,288 +19,15 @@
#include "shared_realm.hpp"
#include "realm_delegate.hpp"
#include "transact_log_handler.hpp"
#include <realm/commit_log.hpp>
#include <realm/group_shared.hpp>
#include <realm/lang_bind_helper.hpp>
#include <mutex>
#include <numeric>
using namespace realm;
namespace {
class TransactLogHandler {
using ColumnInfo = RealmDelegate::ColumnInfo;
using ObserverState = RealmDelegate::ObserverState;
size_t currentTable = 0;
std::vector<ObserverState> observers;
std::vector<void *> invalidated;
ColumnInfo *activeLinkList = nullptr;
RealmDelegate* m_delegate;
// Get the change info for the given column, creating it if needed
static ColumnInfo& get_change(ObserverState& state, size_t i)
{
if (state.changes.size() <= i) {
state.changes.resize(std::max(state.changes.size() * 2, i + 1));
}
return state.changes[i];
}
// Loop over the columns which were changed in an observer state
template<typename Func>
static void for_each(ObserverState& state, Func&& f)
{
for (size_t i = 0; i < state.changes.size(); ++i) {
auto const& change = state.changes[i];
if (change.changed) {
f(i, change);
}
}
}
// Mark the given row/col as needing notifications sent
bool mark_dirty(size_t row_ndx, size_t col_ndx)
{
auto it = lower_bound(begin(observers), end(observers), ObserverState{currentTable, row_ndx, nullptr});
if (it != end(observers) && it->table_ndx == currentTable && it->row_ndx == row_ndx) {
get_change(*it, col_ndx).changed = true;
}
return true;
}
// Remove the given observer from the list of observed objects and add it
// to the listed of invalidated objects
void invalidate(ObserverState *o)
{
invalidated.push_back(o->info);
observers.erase(observers.begin() + (o - &observers[0]));
}
public:
template<typename Func>
TransactLogHandler(RealmDelegate* delegate, SharedGroup& sg, Func&& func)
: m_delegate(delegate)
{
if (!delegate) {
func();
return;
}
observers = delegate->get_observed_rows();
if (observers.empty()) {
auto old_version = sg.get_version_of_current_transaction();
func();
if (old_version != sg.get_version_of_current_transaction()) {
delegate->did_change({}, {});
}
return;
}
func(*this);
delegate->did_change(observers, invalidated);
}
// Called at the end of the transaction log immediately before the version
// is advanced
void parse_complete()
{
m_delegate->will_change(observers, invalidated);
}
// These would require having an observer before schema init
// Maybe do something here to throw an error when multiple processes have different schemas?
bool insert_group_level_table(size_t, size_t, StringData) noexcept { return false; }
bool erase_group_level_table(size_t, size_t) noexcept { return false; }
bool rename_group_level_table(size_t, StringData) noexcept { return false; }
bool insert_column(size_t, DataType, StringData, bool) { return false; }
bool insert_link_column(size_t, DataType, StringData, size_t, size_t) { return false; }
bool erase_column(size_t) { return false; }
bool erase_link_column(size_t, size_t, size_t) { return false; }
bool rename_column(size_t, StringData) { return false; }
bool add_search_index(size_t) { return false; }
bool remove_search_index(size_t) { return false; }
bool add_primary_key(size_t) { return false; }
bool remove_primary_key() { return false; }
bool set_link_type(size_t, LinkType) { return false; }
bool select_table(size_t group_level_ndx, int, const size_t*) noexcept {
currentTable = group_level_ndx;
return true;
}
bool insert_empty_rows(size_t, size_t, size_t, bool) {
// rows are only inserted at the end, so no need to do anything
return true;
}
bool erase_rows(size_t row_ndx, size_t, size_t last_row_ndx, bool unordered) noexcept {
for (size_t i = 0; i < observers.size(); ++i) {
auto& o = observers[i];
if (o.table_ndx == currentTable) {
if (o.row_ndx == row_ndx) {
invalidate(&o);
--i;
}
else if (unordered && o.row_ndx == last_row_ndx) {
o.row_ndx = row_ndx;
}
else if (!unordered && o.row_ndx > row_ndx) {
o.row_ndx -= 1;
}
}
}
return true;
}
bool clear_table() noexcept {
for (size_t i = 0; i < observers.size(); ) {
auto& o = observers[i];
if (o.table_ndx == currentTable) {
invalidate(&o);
}
else {
++i;
}
}
return true;
}
bool select_link_list(size_t col, size_t row) {
activeLinkList = nullptr;
for (auto& o : observers) {
if (o.table_ndx == currentTable && o.row_ndx == row) {
activeLinkList = &get_change(o, col);
break;
}
}
return true;
}
void append_link_list_change(ColumnInfo::Kind kind, size_t index) {
ColumnInfo *o = activeLinkList;
if (!o || o->kind == ColumnInfo::Kind::SetAll) {
// Active LinkList isn't observed or already has multiple kinds of changes
return;
}
if (o->kind == ColumnInfo::Kind::None) {
o->kind = kind;
o->changed = true;
o->indices.add(index);
}
else if (o->kind == kind) {
if (kind == ColumnInfo::Kind::Remove) {
o->indices.add_shifted(index);
}
else if (kind == ColumnInfo::Kind::Insert) {
o->indices.insert_at(index);
}
else {
o->indices.add(index);
}
}
else {
// Array KVO can only send a single kind of change at a time, so
// if there's multiple just give up and send "Set"
o->indices.set(0);
o->kind = ColumnInfo::Kind::SetAll;
}
}
bool link_list_set(size_t index, size_t) {
append_link_list_change(ColumnInfo::Kind::Set, index);
return true;
}
bool link_list_insert(size_t index, size_t) {
append_link_list_change(ColumnInfo::Kind::Insert, index);
return true;
}
bool link_list_erase(size_t index) {
append_link_list_change(ColumnInfo::Kind::Remove, index);
return true;
}
bool link_list_nullify(size_t index) {
append_link_list_change(ColumnInfo::Kind::Remove, index);
return true;
}
bool link_list_swap(size_t index1, size_t index2) {
append_link_list_change(ColumnInfo::Kind::Set, index1);
append_link_list_change(ColumnInfo::Kind::Set, index2);
return true;
}
bool link_list_clear(size_t old_size) {
ColumnInfo *o = activeLinkList;
if (!o || o->kind == ColumnInfo::Kind::SetAll) {
return true;
}
if (o->kind == ColumnInfo::Kind::Remove)
old_size += o->indices.size();
else if (o->kind == ColumnInfo::Kind::Insert)
old_size -= o->indices.size();
o->indices.set(old_size);
o->kind = ColumnInfo::Kind::Remove;
o->changed = true;
return true;
}
bool link_list_move(size_t from, size_t to) {
ColumnInfo *o = activeLinkList;
if (!o || o->kind == ColumnInfo::Kind::SetAll) {
return true;
}
if (from > to) {
std::swap(from, to);
}
if (o->kind == ColumnInfo::Kind::None) {
o->kind = ColumnInfo::Kind::Set;
o->changed = true;
}
if (o->kind == ColumnInfo::Kind::Set) {
for (size_t i = from; i <= to; ++i)
o->indices.add(i);
}
else {
o->indices.set(0);
o->kind = ColumnInfo::Kind::SetAll;
}
return true;
}
// Things that just mark the field as modified
bool set_int(size_t col, size_t row, int_fast64_t) { return mark_dirty(row, col); }
bool set_bool(size_t col, size_t row, bool) { return mark_dirty(row, col); }
bool set_float(size_t col, size_t row, float) { return mark_dirty(row, col); }
bool set_double(size_t col, size_t row, double) { return mark_dirty(row, col); }
bool set_string(size_t col, size_t row, StringData) { return mark_dirty(row, col); }
bool set_binary(size_t col, size_t row, BinaryData) { return mark_dirty(row, col); }
bool set_date_time(size_t col, size_t row, DateTime) { return mark_dirty(row, col); }
bool set_table(size_t col, size_t row) { return mark_dirty(row, col); }
bool set_mixed(size_t col, size_t row, const Mixed&) { return mark_dirty(row, col); }
bool set_link(size_t col, size_t row, size_t) { return mark_dirty(row, col); }
bool set_null(size_t col, size_t row) { return mark_dirty(row, col); }
bool nullify_link(size_t col, size_t row) { return mark_dirty(row, col); }
// Things we don't need to do anything for
bool optimize_table() { return false; }
// Things that we don't do in the binding
bool select_descriptor(int, const size_t*) { return true; }
bool add_int_to_column(size_t, int_fast64_t) { return false; }
};
}
RealmCache Realm::s_global_cache;
Realm::Config::Config(const Config& c)
@ -492,9 +219,7 @@ void Realm::begin_transaction()
// make sure we have a read transaction
read_group();
TransactLogHandler(m_delegate.get(), *m_shared_group, [&](auto&&... args) {
LangBindHelper::promote_to_write(*m_shared_group, *m_history, std::move(args)...);
});
transaction::begin(*m_shared_group, *m_history, m_delegate.get());
m_in_transaction = true;
}
@ -507,12 +232,8 @@ void Realm::commit_transaction()
throw InvalidTransactionException("Can't commit a non-existing write transaction");
}
LangBindHelper::commit_and_continue_as_read(*m_shared_group);
m_in_transaction = false;
if (m_delegate) {
m_delegate->transaction_committed();
}
transaction::commit(*m_shared_group, *m_history, m_delegate.get());
}
void Realm::cancel_transaction()
@ -524,13 +245,10 @@ void Realm::cancel_transaction()
throw InvalidTransactionException("Can't cancel a non-existing write transaction");
}
TransactLogHandler(m_delegate.get(), *m_shared_group, [&](auto&&... args) {
LangBindHelper::rollback_and_continue_as_read(*m_shared_group, *m_history, std::move(args)...);
});
m_in_transaction = false;
transaction::cancel(*m_shared_group, *m_history, m_delegate.get());
}
void Realm::invalidate()
{
verify_thread();
@ -574,9 +292,7 @@ void Realm::notify()
if (m_shared_group->has_changed()) { // Throws
if (m_auto_refresh) {
if (m_group) {
TransactLogHandler(m_delegate.get(), *m_shared_group, [&](auto&&... args) {
LangBindHelper::advance_read(*m_shared_group, *m_history, std::move(args)...);
});
transaction::advance(*m_shared_group, *m_history, m_delegate.get());
}
else if (m_delegate) {
m_delegate->did_change({}, {});
@ -605,9 +321,7 @@ bool Realm::refresh()
}
if (m_group) {
TransactLogHandler(m_delegate.get(), *m_shared_group, [&](auto&&... args) {
LangBindHelper::advance_read(*m_shared_group, *m_history, std::move(args)...);
});
transaction::advance(*m_shared_group, *m_history, m_delegate.get());
}
else {
// Create the read transaction

347
transact_log_handler.cpp Normal file
View File

@ -0,0 +1,347 @@
////////////////////////////////////////////////////////////////////////////
//
// Copyright 2015 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 "transact_log_handler.hpp"
#include "realm_delegate.hpp"
#include <realm/commit_log.hpp>
#include <realm/group_shared.hpp>
#include <realm/lang_bind_helper.hpp>
using namespace realm;
namespace {
class TransactLogHandler {
using ColumnInfo = RealmDelegate::ColumnInfo;
using ObserverState = RealmDelegate::ObserverState;
// Observed table rows which need change information
std::vector<ObserverState> m_observers;
// Userdata pointers for rows which have been deleted
std::vector<void *> invalidated;
// Delegate to send change information to
RealmDelegate* m_delegate;
// Index of currently selected table
size_t m_current_table = 0;
// Change information for the currently selected LinkList, if any
ColumnInfo* m_active_linklist = nullptr;
// Get the change info for the given column, creating it if needed
static ColumnInfo& get_change(ObserverState& state, size_t i)
{
if (state.changes.size() <= i) {
state.changes.resize(std::max(state.changes.size() * 2, i + 1));
}
return state.changes[i];
}
// Loop over the columns which were changed in an observer state
template<typename Func>
static void for_each(ObserverState& state, Func&& f)
{
for (size_t i = 0; i < state.changes.size(); ++i) {
auto const& change = state.changes[i];
if (change.changed) {
f(i, change);
}
}
}
// Mark the given row/col as needing notifications sent
bool mark_dirty(size_t row_ndx, size_t col_ndx)
{
auto it = lower_bound(begin(m_observers), end(m_observers), ObserverState{m_current_table, row_ndx, nullptr});
if (it != end(m_observers) && it->table_ndx == m_current_table && it->row_ndx == row_ndx) {
get_change(*it, col_ndx).changed = true;
}
return true;
}
// Remove the given observer from the list of observed objects and add it
// to the listed of invalidated objects
void invalidate(ObserverState *o)
{
invalidated.push_back(o->info);
m_observers.erase(m_observers.begin() + (o - &m_observers[0]));
}
public:
template<typename Func>
TransactLogHandler(RealmDelegate* delegate, SharedGroup& sg, Func&& func)
: m_delegate(delegate)
{
if (!delegate) {
func();
return;
}
m_observers = delegate->get_observed_rows();
if (m_observers.empty()) {
auto old_version = sg.get_version_of_current_transaction();
func();
if (old_version != sg.get_version_of_current_transaction()) {
delegate->did_change({}, {});
}
return;
}
func(*this);
delegate->did_change(m_observers, invalidated);
}
// Called at the end of the transaction log immediately before the version
// is advanced
void parse_complete()
{
m_delegate->will_change(m_observers, invalidated);
}
// These would require having an observer before schema init
// Maybe do something here to throw an error when multiple processes have different schemas?
bool insert_group_level_table(size_t, size_t, StringData) { return false; }
bool erase_group_level_table(size_t, size_t) { return false; }
bool rename_group_level_table(size_t, StringData) { return false; }
bool insert_column(size_t, DataType, StringData, bool) { return false; }
bool insert_link_column(size_t, DataType, StringData, size_t, size_t) { return false; }
bool erase_column(size_t) { return false; }
bool erase_link_column(size_t, size_t, size_t) { return false; }
bool rename_column(size_t, StringData) { return false; }
bool add_search_index(size_t) { return false; }
bool remove_search_index(size_t) { return false; }
bool add_primary_key(size_t) { return false; }
bool remove_primary_key() { return false; }
bool set_link_type(size_t, LinkType) { return false; }
bool select_table(size_t group_level_ndx, int, const size_t*) noexcept
{
m_current_table = group_level_ndx;
return true;
}
bool insert_empty_rows(size_t, size_t, size_t, bool)
{
// rows are only inserted at the end, so no need to do anything
return true;
}
bool erase_rows(size_t row_ndx, size_t, size_t last_row_ndx, bool unordered)
{
for (size_t i = 0; i < m_observers.size(); ++i) {
auto& o = m_observers[i];
if (o.table_ndx == m_current_table) {
if (o.row_ndx == row_ndx) {
invalidate(&o);
--i;
}
else if (unordered && o.row_ndx == last_row_ndx) {
o.row_ndx = row_ndx;
}
else if (!unordered && o.row_ndx > row_ndx) {
o.row_ndx -= 1;
}
}
}
return true;
}
bool clear_table()
{
for (size_t i = 0; i < m_observers.size(); ) {
auto& o = m_observers[i];
if (o.table_ndx == m_current_table) {
invalidate(&o);
}
else {
++i;
}
}
return true;
}
bool select_link_list(size_t col, size_t row)
{
m_active_linklist = nullptr;
for (auto& o : m_observers) {
if (o.table_ndx == m_current_table && o.row_ndx == row) {
m_active_linklist = &get_change(o, col);
break;
}
}
return true;
}
void append_link_list_change(ColumnInfo::Kind kind, size_t index) {
ColumnInfo *o = m_active_linklist;
if (!o || o->kind == ColumnInfo::Kind::SetAll) {
// Active LinkList isn't observed or already has multiple kinds of changes
return;
}
if (o->kind == ColumnInfo::Kind::None) {
o->kind = kind;
o->changed = true;
o->indices.add(index);
}
else if (o->kind == kind) {
if (kind == ColumnInfo::Kind::Remove) {
o->indices.add_shifted(index);
}
else if (kind == ColumnInfo::Kind::Insert) {
o->indices.insert_at(index);
}
else {
o->indices.add(index);
}
}
else {
// Array KVO can only send a single kind of change at a time, so
// if there's multiple just give up and send "Set"
o->indices.set(0);
o->kind = ColumnInfo::Kind::SetAll;
}
}
bool link_list_set(size_t index, size_t)
{
append_link_list_change(ColumnInfo::Kind::Set, index);
return true;
}
bool link_list_insert(size_t index, size_t)
{
append_link_list_change(ColumnInfo::Kind::Insert, index);
return true;
}
bool link_list_erase(size_t index)
{
append_link_list_change(ColumnInfo::Kind::Remove, index);
return true;
}
bool link_list_nullify(size_t index)
{
append_link_list_change(ColumnInfo::Kind::Remove, index);
return true;
}
bool link_list_swap(size_t index1, size_t index2)
{
append_link_list_change(ColumnInfo::Kind::Set, index1);
append_link_list_change(ColumnInfo::Kind::Set, index2);
return true;
}
bool link_list_clear(size_t old_size)
{
ColumnInfo *o = m_active_linklist;
if (!o || o->kind == ColumnInfo::Kind::SetAll) {
return true;
}
if (o->kind == ColumnInfo::Kind::Remove)
old_size += o->indices.size();
else if (o->kind == ColumnInfo::Kind::Insert)
old_size -= o->indices.size();
o->indices.set(old_size);
o->kind = ColumnInfo::Kind::Remove;
o->changed = true;
return true;
}
bool link_list_move(size_t from, size_t to)
{
ColumnInfo *o = m_active_linklist;
if (!o || o->kind == ColumnInfo::Kind::SetAll) {
return true;
}
if (from > to) {
std::swap(from, to);
}
if (o->kind == ColumnInfo::Kind::None) {
o->kind = ColumnInfo::Kind::Set;
o->changed = true;
}
if (o->kind == ColumnInfo::Kind::Set) {
for (size_t i = from; i <= to; ++i)
o->indices.add(i);
}
else {
o->indices.set(0);
o->kind = ColumnInfo::Kind::SetAll;
}
return true;
}
// Things that just mark the field as modified
bool set_int(size_t col, size_t row, int_fast64_t) { return mark_dirty(row, col); }
bool set_bool(size_t col, size_t row, bool) { return mark_dirty(row, col); }
bool set_float(size_t col, size_t row, float) { return mark_dirty(row, col); }
bool set_double(size_t col, size_t row, double) { return mark_dirty(row, col); }
bool set_string(size_t col, size_t row, StringData) { return mark_dirty(row, col); }
bool set_binary(size_t col, size_t row, BinaryData) { return mark_dirty(row, col); }
bool set_date_time(size_t col, size_t row, DateTime) { return mark_dirty(row, col); }
bool set_table(size_t col, size_t row) { return mark_dirty(row, col); }
bool set_mixed(size_t col, size_t row, const Mixed&) { return mark_dirty(row, col); }
bool set_link(size_t col, size_t row, size_t) { return mark_dirty(row, col); }
bool set_null(size_t col, size_t row) { return mark_dirty(row, col); }
bool nullify_link(size_t col, size_t row) { return mark_dirty(row, col); }
// Doesn't change any data
bool optimize_table() { return true; }
// Used for subtables, which we currently don't support
bool select_descriptor(int, const size_t*) { return false; }
};
} // anonymous namespace
namespace realm {
namespace transaction {
void advance(SharedGroup& sg, ClientHistory& history, RealmDelegate* delegate) {
TransactLogHandler(delegate, sg, [&](auto&&... args) {
LangBindHelper::advance_read(sg, history, std::move(args)...);
});
}
void begin(SharedGroup& sg, ClientHistory& history, RealmDelegate* delegate) {
TransactLogHandler(delegate, sg, [&](auto&&... args) {
LangBindHelper::promote_to_write(sg, history, std::move(args)...);
});
}
void commit(SharedGroup& sg, ClientHistory&, RealmDelegate* delegate) {
LangBindHelper::commit_and_continue_as_read(sg);
if (delegate) {
delegate->transaction_committed();
}
}
void cancel(SharedGroup& sg, ClientHistory& history, RealmDelegate* delegate) {
TransactLogHandler(delegate, sg, [&](auto&&... args) {
LangBindHelper::rollback_and_continue_as_read(sg, history, std::move(args)...);
});
}
} // namespace transaction
} // namespace realm

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////////////////////////////////////////////////////////////////////////////
//
// Copyright 2015 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.
//
////////////////////////////////////////////////////////////////////////////
#ifndef REALM_TRANSACT_LOG_HANDLER_HPP
#define REALM_TRANSACT_LOG_HANDLER_HPP
namespace realm {
class RealmDelegate;
class SharedGroup;
class ClientHistory;
namespace transaction {
// Advance the read transaction version, with change notifications sent to delegate
// Must not be called from within a write transaction.
void advance(SharedGroup& sg, ClientHistory& history, RealmDelegate* delegate);
// Begin a write transaction
// If the read transaction version is not up to date, will first advance to the
// most recent read transaction and sent notifications to delegate
void begin(SharedGroup& sg, ClientHistory& history, RealmDelegate* delegate);
// Commit a write transaction
void commit(SharedGroup& sg, ClientHistory& history, RealmDelegate* delegate);
// Cancel a write transaction and roll back all changes, with change notifications
// for reverting to the old values sent to delegate
void cancel(SharedGroup& sg, ClientHistory& history, RealmDelegate* delegate);
} // namespace transaction
} // namespace realm
#endif /* REALM_TRANSACT_LOG_HANDLER_HPP */