merge 1.5

Summary:

as subject

Test Plan:

db_test table_test

Reviewers: dhruba
This commit is contained in:
heyongqiang 2012-08-26 23:45:35 -07:00
parent 6fee5a74f5
commit a4f9b8b49e
20 changed files with 224 additions and 299 deletions

View File

@ -3,8 +3,6 @@
# found in the LICENSE file. See the AUTHORS file for names of contributors.
# Inherit some settings from environment variables, if available
CXX ?= g++
CC ?= gcc
INSTALL_PATH ?= $(CURDIR)
#-----------------------------------------------
@ -71,21 +69,31 @@ default: all
# Should we build shared libraries?
ifneq ($(PLATFORM_SHARED_EXT),)
ifneq ($(PLATFORM_SHARED_VERSIONED),true)
SHARED1 = libleveldb.$(PLATFORM_SHARED_EXT)
SHARED2 = $(SHARED1)
SHARED3 = $(SHARED1)
SHARED = $(SHARED1)
else
# Update db.h if you change these.
SHARED_MAJOR = 1
SHARED_MINOR = 4
SHARED_MINOR = 5
SHARED1 = libleveldb.$(PLATFORM_SHARED_EXT)
SHARED2 = $(SHARED1).$(SHARED_MAJOR)
SHARED3 = $(SHARED1).$(SHARED_MAJOR).$(SHARED_MINOR)
SHARED = $(SHARED1) $(SHARED2) $(SHARED3)
$(SHARED3):
$(CXX) $(LDFLAGS) $(PLATFORM_SHARED_LDFLAGS)$(INSTALL_PATH)/$(SHARED2) $(CXXFLAGS) $(PLATFORM_SHARED_CFLAGS) $(SOURCES) $(SOURCESCPP) -o $(SHARED3) $(EXEC_LDFLAGS_SHARED)
$(SHARED2): $(SHARED3)
ln -fs $(SHARED3) $(SHARED2)
$(SHARED1): $(SHARED3)
ln -fs $(SHARED3) $(SHARED1)
$(SHARED2): $(SHARED3)
ln -fs $(SHARED3) $(SHARED2)
endif
$(SHARED3):
$(CXX) $(LDFLAGS) $(PLATFORM_SHARED_LDFLAGS)$(SHARED2) $(CXXFLAGS) $(PLATFORM_SHARED_CFLAGS) $(SOURCES) -o $(SHARED3)
endif # PLATFORM_SHARED_EXT
all: $(VERSIONFILE) $(SHARED) $(LIBRARY) $(THRIFTSERVER) $(TOOLS)
check: all $(PROGRAMS) $(TESTS) $(TOOLS)
@ -202,9 +210,10 @@ $(VERSIONFILE): build_detect_version
ifeq ($(PLATFORM), IOS)
# For iOS, create universal object files to be used on both the simulator and
# a device.
SIMULATORROOT=/Developer/Platforms/iPhoneSimulator.platform/Developer
DEVICEROOT=/Developer/Platforms/iPhoneOS.platform/Developer
IOSVERSION=$(shell defaults read /Developer/Platforms/iPhoneOS.platform/version CFBundleShortVersionString)
PLATFORMSROOT=/Applications/Xcode.app/Contents/Developer/Platforms
SIMULATORROOT=$(PLATFORMSROOT)/iPhoneSimulator.platform/Developer
DEVICEROOT=$(PLATFORMSROOT)/iPhoneOS.platform/Developer
IOSVERSION=$(shell defaults read $(PLATFORMSROOT)/iPhoneOS.platform/versionCFBundleShortVersionString)
.cc.o:
mkdir -p ios-x86/$(dir $@)

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@ -4,18 +4,27 @@
# argument, which in turn gets read while processing Makefile.
#
# The output will set the following variables:
# CC C Compiler path
# CXX C++ Compiler path
# PLATFORM_LDFLAGS Linker flags
# PLATFORM_SHARED_EXT Extension for shared libraries
# PLATFORM_SHARED_LDFLAGS Flags for building shared library
# PLATFORM_SHARED_CFLAGS Flags for compiling objects for shared library
# PLATFORM_CCFLAGS C compiler flags
# PLATFORM_CXXFLAGS C++ compiler flags. Will contain:
# PLATFORM_SHARED_VERSIONED Set to 'true' if platform supports versioned
# shared libraries, empty otherwise.
#
# The PLATFORM_CCFLAGS and PLATFORM_CXXFLAGS might include the following:
#
# -DLEVELDB_PLATFORM_POSIX if cstdatomic is present
# -DLEVELDB_PLATFORM_NOATOMIC if it is not
# -DSNAPPY if the Snappy library is present
#
OUTPUT=$1
if test -z "$OUTPUT"; then
echo "usage: $0 <output-filename>"
echo "usage: $0 <output-filename>" >&2
exit 1
fi
@ -23,6 +32,10 @@ fi
rm -f $OUTPUT
touch $OUTPUT
if test -z "$CC"; then
CC=cc
fi
if test -z "$CXX"; then
CXX=g++
fi
@ -33,12 +46,14 @@ if test -z "$TARGET_OS"; then
fi
COMMON_FLAGS=
CROSS_COMPILE=
PLATFORM_CCFLAGS=
PLATFORM_CXXFLAGS=
PLATFORM_LDFLAGS=
PLATFORM_SHARED_EXT="so"
PLATFORM_SHARED_LDFLAGS="-shared -Wl,-soname -Wl,"
PLATFORM_SHARED_CFLAGS="-fPIC"
PLATFORM_SHARED_VERSIONED=true
# On GCC, we pick libc's memcmp over GCC's memcmp via -fno-builtin-memcmp
case "$TARGET_OS" in
@ -86,13 +101,14 @@ case "$TARGET_OS" in
PORT_FILE=port/port_posix.cc
;;
OS_ANDROID_CROSSCOMPILE)
PLATFORM="$TARGET_OS"
COMMON_FLAGS=""
PLATFORM_LDFLAGS=""
PORT_FILE=port/port_android.cc
PLATFORM=OS_ANDROID
COMMON_FLAGS="-fno-builtin-memcmp -D_REENTRANT -DOS_ANDROID -DLEVELDB_PLATFORM_POSIX"
PLATFORM_LDFLAGS="" # All pthread features are in the Android C library
PORT_FILE=port/port_posix.cc
CROSS_COMPILE=true
;;
*)
echo "Unknown platform!"
echo "Unknown platform!" >&2
exit 1
esac
@ -125,7 +141,7 @@ echo "SOURCES=$PORTABLE_FILES $PORT_FILE" >> $OUTPUT
echo "SOURCESCPP=$PORTABLE_CPP" >> $OUTPUT
echo "MEMENV_SOURCES=helpers/memenv/memenv.cc" >> $OUTPUT
if [ "$PLATFORM" = "OS_ANDROID_CROSSCOMPILE" ]; then
if [ "$CROSS_COMPILE" = "true" ]; then
# Cross-compiling; do not try any compilation tests.
true
else
@ -212,6 +228,8 @@ fi
PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS"
PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS $COMMON_FLAGS"
echo "CC=$CC" >> $OUTPUT
echo "CXX=$CXX" >> $OUTPUT
echo "PLATFORM=$PLATFORM" >> $OUTPUT
echo "PLATFORM_LDFLAGS=$PLATFORM_LDFLAGS" >> $OUTPUT
echo "PLATFORM_CCFLAGS=$PLATFORM_CCFLAGS" >> $OUTPUT

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@ -19,6 +19,13 @@ static void StartPhase(const char* name) {
phase = name;
}
static const char* GetTempDir(void) {
const char* ret = getenv("TEST_TMPDIR");
if (ret == NULL || ret[0] == '\0')
ret = "/tmp";
return ret;
}
#define CheckNoError(err) \
if ((err) != NULL) { \
fprintf(stderr, "%s:%d: %s: %s\n", __FILE__, __LINE__, phase, (err)); \
@ -158,7 +165,9 @@ int main(int argc, char** argv) {
char* err = NULL;
int run = -1;
snprintf(dbname, sizeof(dbname), "/tmp/leveldb_c_test-%d",
snprintf(dbname, sizeof(dbname),
"%s/leveldb_c_test-%d",
GetTempDir(),
((int) geteuid()));
StartPhase("create_objects");

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@ -103,7 +103,7 @@ static int FLAGS_bloom_bits = -1;
static bool FLAGS_use_existing_db = false;
// Use the db with the following name.
static const char* FLAGS_db = "/tmp/dbbench";
static const char* FLAGS_db = NULL;
// Number of shards for the block cache is 2 ** FLAGS_cache_numshardbits.
// Negative means use default settings. This is applied only
@ -1017,6 +1017,7 @@ class Benchmark {
int main(int argc, char** argv) {
FLAGS_write_buffer_size = leveldb::Options().write_buffer_size;
FLAGS_open_files = leveldb::Options().max_open_files;
std::string default_db_path;
for (int i = 1; i < argc; i++) {
double d;
@ -1106,6 +1107,13 @@ int main(int argc, char** argv) {
}
}
// Choose a location for the test database if none given with --db=<path>
if (FLAGS_db == NULL) {
leveldb::Env::Default()->GetTestDirectory(&default_db_path);
default_db_path += "/dbbench";
FLAGS_db = default_db_path.c_str();
}
leveldb::Benchmark benchmark;
benchmark.Run();
return 0;

View File

@ -1395,6 +1395,8 @@ Status DBImpl::MakeRoomForWrite(bool force) {
WritableFile* lfile = NULL;
s = env_->NewWritableFile(LogFileName(dbname_, new_log_number), &lfile);
if (!s.ok()) {
// Avoid chewing through file number space in a tight loop.
versions_->ReuseFileNumber(new_log_number);
break;
}
delete log_;

View File

@ -152,6 +152,7 @@ class DBTest {
enum OptionConfig {
kDefault,
kFilter,
kUncompressed,
kNumLevel_3,
kEnd
};
@ -183,10 +184,10 @@ class DBTest {
// Switch to a fresh database with the next option configuration to
// test. Return false if there are no more configurations to test.
bool ChangeOptions() {
if (option_config_ == kEnd) {
option_config_++;
if (option_config_ >= kEnd) {
return false;
} else {
option_config_++;
DestroyAndReopen();
return true;
}
@ -199,6 +200,9 @@ class DBTest {
case kFilter:
options.filter_policy = filter_policy_;
break;
case kUncompressed:
options.compression = kNoCompression;
break;
case kNumLevel_3:
options.num_levels = 3;
break;
@ -575,13 +579,15 @@ TEST(DBTest, GetEncountersEmptyLevel) {
ASSERT_EQ(NumTableFilesAtLevel(1), 0);
ASSERT_EQ(NumTableFilesAtLevel(2), 1);
// Step 3: read until level 0 compaction disappears.
int read_count = 0;
while (NumTableFilesAtLevel(0) > 0) {
ASSERT_LE(read_count, 10000) << "did not trigger level 0 compaction";
read_count++;
// Step 3: read a bunch of times
for (int i = 0; i < 1000; i++) {
ASSERT_EQ("NOT_FOUND", Get("missing"));
}
// Step 4: Wait for compaction to finish
env_->SleepForMicroseconds(1000000);
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
} while (ChangeOptions());
}
@ -1583,6 +1589,7 @@ TEST(DBTest, NoSpace) {
Compact("a", "z");
const int num_files = CountFiles();
env_->no_space_.Release_Store(env_); // Force out-of-space errors
env_->sleep_counter_.Reset();
for (int i = 0; i < 5; i++) {
for (int level = 0; level < dbfull()->NumberLevels()-1; level++) {
dbfull()->TEST_CompactRange(level, NULL, NULL);

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@ -107,7 +107,7 @@ bool SomeFileOverlapsRange(
const Comparator* ucmp = icmp.user_comparator();
if (!disjoint_sorted_files) {
// Need to check against all files
for (int i = 0; i < files.size(); i++) {
for (size_t i = 0; i < files.size(); i++) {
const FileMetaData* f = files[i];
if (AfterFile(ucmp, smallest_user_key, f) ||
BeforeFile(ucmp, largest_user_key, f)) {
@ -1479,7 +1479,7 @@ Compaction* VersionSet::CompactRange(
// Avoid compacting too much in one shot in case the range is large.
const uint64_t limit = MaxFileSizeForLevel(level);
uint64_t total = 0;
for (int i = 0; i < inputs.size(); i++) {
for (size_t i = 0; i < inputs.size(); i++) {
uint64_t s = inputs[i]->file_size;
total += s;
if (total >= limit) {

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@ -167,6 +167,15 @@ class VersionSet {
// Allocate and return a new file number
uint64_t NewFileNumber() { return next_file_number_++; }
// Arrange to reuse "file_number" unless a newer file number has
// already been allocated.
// REQUIRES: "file_number" was returned by a call to NewFileNumber().
void ReuseFileNumber(uint64_t file_number) {
if (next_file_number_ == file_number + 1) {
next_file_number_ = file_number;
}
}
// Return the number of Table files at the specified level.
int NumLevelFiles(int level) const;

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@ -75,6 +75,9 @@ static bool FLAGS_transaction = true;
// If true, we enable Write-Ahead Logging
static bool FLAGS_WAL_enabled = true;
// Use the db with the following name.
static const char* FLAGS_db = NULL;
inline
static void ExecErrorCheck(int status, char *err_msg) {
if (status != SQLITE_OK) {
@ -317,11 +320,16 @@ class Benchmark {
bytes_(0),
rand_(301) {
std::vector<std::string> files;
Env::Default()->GetChildren("/tmp", &files);
std::string test_dir;
Env::Default()->GetTestDirectory(&test_dir);
Env::Default()->GetChildren(test_dir, &files);
if (!FLAGS_use_existing_db) {
for (int i = 0; i < files.size(); i++) {
if (Slice(files[i]).starts_with("dbbench_sqlite3")) {
Env::Default()->DeleteFile("/tmp/" + files[i]);
std::string file_name(test_dir);
file_name += "/";
file_name += files[i];
Env::Default()->DeleteFile(file_name.c_str());
}
}
}
@ -415,7 +423,11 @@ class Benchmark {
db_num_++;
// Open database
snprintf(file_name, sizeof(file_name), "/tmp/dbbench_sqlite3-%d.db",
std::string tmp_dir;
Env::Default()->GetTestDirectory(&tmp_dir);
snprintf(file_name, sizeof(file_name),
"%s/dbbench_sqlite3-%d.db",
tmp_dir.c_str(),
db_num_);
status = sqlite3_open(file_name, &db_);
if (status) {
@ -655,6 +667,7 @@ class Benchmark {
} // namespace leveldb
int main(int argc, char** argv) {
std::string default_db_path;
for (int i = 1; i < argc; i++) {
double d;
int n;
@ -684,12 +697,21 @@ int main(int argc, char** argv) {
} else if (sscanf(argv[i], "--WAL_enabled=%d%c", &n, &junk) == 1 &&
(n == 0 || n == 1)) {
FLAGS_WAL_enabled = n;
} else if (strncmp(argv[i], "--db=", 5) == 0) {
FLAGS_db = argv[i] + 5;
} else {
fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
exit(1);
}
}
// Choose a location for the test database if none given with --db=<path>
if (FLAGS_db == NULL) {
leveldb::Env::Default()->GetTestDirectory(&default_db_path);
default_db_path += "/dbbench";
FLAGS_db = default_db_path.c_str();
}
leveldb::Benchmark benchmark;
benchmark.Run();
return 0;

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@ -68,6 +68,9 @@ static bool FLAGS_use_existing_db = false;
// is off.
static bool FLAGS_compression = true;
// Use the db with the following name.
static const char* FLAGS_db = NULL;
inline
static void DBSynchronize(kyotocabinet::TreeDB* db_)
{
@ -292,11 +295,16 @@ class Benchmark {
bytes_(0),
rand_(301) {
std::vector<std::string> files;
Env::Default()->GetChildren("/tmp", &files);
std::string test_dir;
Env::Default()->GetTestDirectory(&test_dir);
Env::Default()->GetChildren(test_dir.c_str(), &files);
if (!FLAGS_use_existing_db) {
for (int i = 0; i < files.size(); i++) {
if (Slice(files[i]).starts_with("dbbench_polyDB")) {
Env::Default()->DeleteFile("/tmp/" + files[i]);
std::string file_name(test_dir);
file_name += "/";
file_name += files[i];
Env::Default()->DeleteFile(file_name.c_str());
}
}
}
@ -385,8 +393,12 @@ class Benchmark {
db_ = new kyotocabinet::TreeDB();
char file_name[100];
db_num_++;
snprintf(file_name, sizeof(file_name), "/tmp/dbbench_polyDB-%d.kct",
db_num_);
std::string test_dir;
Env::Default()->GetTestDirectory(&test_dir);
snprintf(file_name, sizeof(file_name),
"%s/dbbench_polyDB-%d.kct",
test_dir.c_str(),
db_num_);
// Create tuning options and open the database
int open_options = kyotocabinet::PolyDB::OWRITER |
@ -470,6 +482,7 @@ class Benchmark {
} // namespace leveldb
int main(int argc, char** argv) {
std::string default_db_path;
for (int i = 1; i < argc; i++) {
double d;
int n;
@ -494,12 +507,21 @@ int main(int argc, char** argv) {
} else if (sscanf(argv[i], "--compression=%d%c", &n, &junk) == 1 &&
(n == 0 || n == 1)) {
FLAGS_compression = (n == 1) ? true : false;
} else if (strncmp(argv[i], "--db=", 5) == 0) {
FLAGS_db = argv[i] + 5;
} else {
fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
exit(1);
}
}
// Choose a location for the test database if none given with --db=<path>
if (FLAGS_db == NULL) {
leveldb::Env::Default()->GetTestDirectory(&default_db_path);
default_db_path += "/dbbench";
FLAGS_db = default_db_path.c_str();
}
leveldb::Benchmark benchmark;
benchmark.Run();
return 0;

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@ -14,7 +14,7 @@ namespace leveldb {
// Update Makefile if you change these
static const int kMajorVersion = 1;
static const int kMinorVersion = 4;
static const int kMinorVersion = 5;
struct Options;
struct ReadOptions;

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@ -73,13 +73,21 @@ inline void MemoryBarrier() {
}
#define LEVELDB_HAVE_MEMORY_BARRIER
// ARM
#elif defined(ARCH_CPU_ARM_FAMILY)
// ARM Linux
#elif defined(ARCH_CPU_ARM_FAMILY) && defined(__linux__)
typedef void (*LinuxKernelMemoryBarrierFunc)(void);
LinuxKernelMemoryBarrierFunc pLinuxKernelMemoryBarrier __attribute__((weak)) =
(LinuxKernelMemoryBarrierFunc) 0xffff0fa0;
// The Linux ARM kernel provides a highly optimized device-specific memory
// barrier function at a fixed memory address that is mapped in every
// user-level process.
//
// This beats using CPU-specific instructions which are, on single-core
// devices, un-necessary and very costly (e.g. ARMv7-A "dmb" takes more
// than 180ns on a Cortex-A8 like the one on a Nexus One). Benchmarking
// shows that the extra function call cost is completely negligible on
// multi-core devices.
//
inline void MemoryBarrier() {
pLinuxKernelMemoryBarrier();
(*(LinuxKernelMemoryBarrierFunc)0xffff0fa0)();
}
#define LEVELDB_HAVE_MEMORY_BARRIER

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@ -14,8 +14,6 @@
# include "port/port_posix.h"
#elif defined(LEVELDB_PLATFORM_CHROMIUM)
# include "port/port_chromium.h"
#elif defined(LEVELDB_PLATFORM_ANDROID)
# include "port/port_android.h"
#endif
#endif // STORAGE_LEVELDB_PORT_PORT_H_

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@ -1,64 +0,0 @@
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "port/port_android.h"
#include <cstdlib>
extern "C" {
size_t fread_unlocked(void *a, size_t b, size_t c, FILE *d) {
return fread(a, b, c, d);
}
size_t fwrite_unlocked(const void *a, size_t b, size_t c, FILE *d) {
return fwrite(a, b, c, d);
}
int fflush_unlocked(FILE *f) {
return fflush(f);
}
int fdatasync(int fd) {
return fsync(fd);
}
}
namespace leveldb {
namespace port {
static void PthreadCall(const char* label, int result) {
if (result != 0) {
fprintf(stderr, "pthread %s: %s\n", label, strerror(result));
abort();
}
}
Mutex::Mutex() { PthreadCall("init mutex", pthread_mutex_init(&mu_, NULL)); }
Mutex::~Mutex() { PthreadCall("destroy mutex", pthread_mutex_destroy(&mu_)); }
void Mutex::Lock() { PthreadCall("lock", pthread_mutex_lock(&mu_)); }
void Mutex::Unlock() { PthreadCall("unlock", pthread_mutex_unlock(&mu_)); }
CondVar::CondVar(Mutex* mu)
: mu_(mu) {
PthreadCall("init cv", pthread_cond_init(&cv_, NULL));
}
CondVar::~CondVar() {
PthreadCall("destroy cv", pthread_cond_destroy(&cv_));
}
void CondVar::Wait() {
PthreadCall("wait", pthread_cond_wait(&cv_, &mu_->mu_));
}
void CondVar::Signal(){
PthreadCall("signal", pthread_cond_signal(&cv_));
}
void CondVar::SignalAll() {
PthreadCall("broadcast", pthread_cond_broadcast(&cv_));
}
} // namespace port
} // namespace leveldb

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@ -1,180 +0,0 @@
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
//
// See port_example.h for documentation for the following types/functions.
#ifndef STORAGE_LEVELDB_PORT_PORT_ANDROID_H_
#define STORAGE_LEVELDB_PORT_PORT_ANDROID_H_
#include <endian.h>
#include <pthread.h>
#include <stdint.h>
#include <unistd.h>
#include <string>
#include <cctype>
// Collapse the plethora of ARM flavors available to an easier to manage set
// Defs reference is at https://wiki.edubuntu.org/ARM/Thumb2PortingHowto
#if defined(__ARM_ARCH_6__) || \
defined(__ARM_ARCH_6J__) || \
defined(__ARM_ARCH_6K__) || \
defined(__ARM_ARCH_6Z__) || \
defined(__ARM_ARCH_6T2__) || \
defined(__ARM_ARCH_6ZK__) || \
defined(__ARM_ARCH_7__) || \
defined(__ARM_ARCH_7R__) || \
defined(__ARM_ARCH_7A__)
#define ARMV6_OR_7 1
#endif
extern "C" {
size_t fread_unlocked(void *a, size_t b, size_t c, FILE *d);
size_t fwrite_unlocked(const void *a, size_t b, size_t c, FILE *d);
int fflush_unlocked(FILE *f);
int fdatasync (int fd);
}
namespace leveldb {
namespace port {
static const bool kLittleEndian = __BYTE_ORDER == __LITTLE_ENDIAN;
class CondVar;
class Mutex {
public:
Mutex();
~Mutex();
void Lock();
void Unlock();
void AssertHeld() {
//TODO(gabor): How can I implement this?
}
private:
friend class CondVar;
pthread_mutex_t mu_;
// No copying
Mutex(const Mutex&);
void operator=(const Mutex&);
};
class CondVar {
public:
explicit CondVar(Mutex* mu);
~CondVar();
void Wait();
void Signal();
void SignalAll();
private:
Mutex* mu_;
pthread_cond_t cv_;
};
#ifndef ARMV6_OR_7
// On ARM chipsets <V6, 0xffff0fa0 is the hard coded address of a
// memory barrier function provided by the kernel.
typedef void (*LinuxKernelMemoryBarrierFunc)(void);
// TODO(user): ATTRIBUTE_WEAK is undefined, so this fails to build on
// non-ARMV6_OR_7. We may be able to replace it with __attribute__((weak)) for
// older ARM builds, but x86 builds will require a different memory barrier.
LinuxKernelMemoryBarrierFunc pLinuxKernelMemoryBarrier ATTRIBUTE_WEAK =
(LinuxKernelMemoryBarrierFunc) 0xffff0fa0;
#endif
// Storage for a lock-free pointer
class AtomicPointer {
private:
void* rep_;
inline void MemoryBarrier() const {
// TODO(gabor): This only works on Android instruction sets >= V6
#ifdef ARMV6_OR_7
__asm__ __volatile__("dmb" : : : "memory");
#else
pLinuxKernelMemoryBarrier();
#endif
}
public:
AtomicPointer() { }
explicit AtomicPointer(void* v) : rep_(v) { }
inline void* Acquire_Load() const {
void* r = rep_;
MemoryBarrier();
return r;
}
inline void Release_Store(void* v) {
MemoryBarrier();
rep_ = v;
}
inline void* NoBarrier_Load() const {
void* r = rep_;
return r;
}
inline void NoBarrier_Store(void* v) {
rep_ = v;
}
};
// TODO(gabor): Implement compress
inline bool Snappy_Compress(
const char* input,
size_t input_length,
std::string* output) {
return false;
}
// TODO(gabor): Implement uncompress
inline bool Snappy_GetUncompressedLength(const char* input, size_t length,
size_t* result) {
return false;
}
// TODO(gabor): Implement uncompress
inline bool Snappy_Uncompress(
const char* input_data,
size_t input_length,
char* output) {
return false;
}
inline bool Zlib_Compress(const char* input, size_t length,
::std::string* output, int windowBits = 15, int level = -1,
int strategy = 0) {
return false;
}
inline char* Zlib_Uncompress(const char* input_data, size_t input_length,
int* decompress_size, int windowBits = 15) {
return false;
}
inline bool BZip2_Compress(const char* input, size_t length,
::std::string* output) {
return false;
}
inline char* BZip2_Uncompress( const char* input_data, size_t input_length,
int* decompress_size) {
return false;
}
inline uint64_t ThreadIdentifier() {
pthread_t tid = pthread_self();
uint64_t r = 0;
memcpy(&r, &tid, sizeof(r) < sizeof(tid) ? sizeof(r) : sizeof(tid));
return r;
}
inline bool GetHeapProfile(void (*func)(void*, const char*, int), void* arg) {
return false;
}
} // namespace port
} // namespace leveldb
#endif // STORAGE_LEVELDB_PORT_PORT_ANDROID_H_

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@ -60,6 +60,16 @@ class CondVar {
void SignallAll();
};
// Thread-safe initialization.
// Used as follows:
// static port::OnceType init_control = LEVELDB_ONCE_INIT;
// static void Initializer() { ... do something ...; }
// ...
// port::InitOnce(&init_control, &Initializer);
typedef intptr_t OnceType;
#define LEVELDB_ONCE_INIT 0
extern void InitOnce(port::OnceType*, void (*initializer)());
// A type that holds a pointer that can be read or written atomically
// (i.e., without word-tearing.)
class AtomicPointer {

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@ -46,5 +46,9 @@ void CondVar::SignalAll() {
PthreadCall("broadcast", pthread_cond_broadcast(&cv_));
}
void InitOnce(OnceType* once, void (*initializer)()) {
PthreadCall("once", pthread_once(once, initializer));
}
} // namespace port
} // namespace leveldb

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@ -7,17 +7,22 @@
#ifndef STORAGE_LEVELDB_PORT_PORT_POSIX_H_
#define STORAGE_LEVELDB_PORT_PORT_POSIX_H_
#undef PLATFORM_IS_LITTLE_ENDIAN
#if defined(OS_MACOSX)
#include <machine/endian.h>
#if defined(__DARWIN_LITTLE_ENDIAN) && defined(__DARWIN_BYTE_ORDER)
#define PLATFORM_IS_LITTLE_ENDIAN \
(__DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN)
#endif
#elif defined(OS_SOLARIS)
#include <sys/isa_defs.h>
#ifdef _LITTLE_ENDIAN
#define LITTLE_ENDIAN
#define PLATFORM_IS_LITTLE_ENDIAN true
#else
#define BIG_ENDIAN
#define PLATFORM_IS_LITTLE_ENDIAN false
#endif
#elif defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(OS_NETBSD) ||\
defined(OS_DRAGONFLYBSD)
defined(OS_DRAGONFLYBSD) || defined(OS_ANDROID)
#include <sys/types.h>
#include <sys/endian.h>
#else
@ -41,14 +46,13 @@
#include <string.h>
#include "port/atomic_pointer.h"
#ifdef LITTLE_ENDIAN
#define IS_LITTLE_ENDIAN true
#else
#define IS_LITTLE_ENDIAN (__BYTE_ORDER == __LITTLE_ENDIAN)
#ifndef PLATFORM_IS_LITTLE_ENDIAN
#define PLATFORM_IS_LITTLE_ENDIAN (__BYTE_ORDER == __LITTLE_ENDIAN)
#endif
#if defined(OS_MACOSX) || defined(OS_SOLARIS) || defined(OS_FREEBSD) ||\
defined(OS_NETBSD) || defined(OS_OPENBSD) || defined(OS_DRAGONFLYBSD)
defined(OS_NETBSD) || defined(OS_OPENBSD) || defined(OS_DRAGONFLYBSD) ||\
defined(OS_ANDROID)
// Use fread/fwrite/fflush on platforms without _unlocked variants
#define fread_unlocked fread
#define fwrite_unlocked fwrite
@ -61,10 +65,17 @@
#define fdatasync fsync
#endif
#if defined(OS_ANDROID) && __ANDROID_API__ < 9
// fdatasync() was only introduced in API level 9 on Android. Use fsync()
// when targetting older platforms.
#define fdatasync fsync
#endif
namespace leveldb {
namespace port {
static const bool kLittleEndian = IS_LITTLE_ENDIAN;
static const bool kLittleEndian = PLATFORM_IS_LITTLE_ENDIAN;
#undef PLATFORM_IS_LITTLE_ENDIAN
class CondVar;
@ -98,6 +109,10 @@ class CondVar {
Mutex* mu_;
};
typedef pthread_once_t OnceType;
#define LEVELDB_ONCE_INIT PTHREAD_ONCE_INIT
extern void InitOnce(OnceType* once, void (*initializer)());
inline bool Snappy_Compress(const char* input, size_t length,
::std::string* output) {
#ifdef SNAPPY

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@ -51,6 +51,29 @@ TEST(Coding, Fixed64) {
}
}
// Test that encoding routines generate little-endian encodings
TEST(Coding, EncodingOutput) {
std::string dst;
PutFixed32(&dst, 0x04030201);
ASSERT_EQ(4, dst.size());
ASSERT_EQ(0x01, static_cast<int>(dst[0]));
ASSERT_EQ(0x02, static_cast<int>(dst[1]));
ASSERT_EQ(0x03, static_cast<int>(dst[2]));
ASSERT_EQ(0x04, static_cast<int>(dst[3]));
dst.clear();
PutFixed64(&dst, 0x0807060504030201ull);
ASSERT_EQ(8, dst.size());
ASSERT_EQ(0x01, static_cast<int>(dst[0]));
ASSERT_EQ(0x02, static_cast<int>(dst[1]));
ASSERT_EQ(0x03, static_cast<int>(dst[2]));
ASSERT_EQ(0x04, static_cast<int>(dst[3]));
ASSERT_EQ(0x05, static_cast<int>(dst[4]));
ASSERT_EQ(0x06, static_cast<int>(dst[5]));
ASSERT_EQ(0x07, static_cast<int>(dst[6]));
ASSERT_EQ(0x08, static_cast<int>(dst[7]));
}
TEST(Coding, Varint32) {
std::string s;
for (uint32_t i = 0; i < (32 * 32); i++) {

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@ -6,6 +6,7 @@
#include <stdint.h>
#include "leveldb/comparator.h"
#include "leveldb/slice.h"
#include "port/port.h"
#include "util/logging.h"
namespace leveldb {
@ -65,11 +66,15 @@ class BytewiseComparatorImpl : public Comparator {
};
} // namespace
// Intentionally not destroyed to prevent destructor racing
// with background threads.
static const Comparator* bytewise = new BytewiseComparatorImpl;
static port::OnceType once = LEVELDB_ONCE_INIT;
static const Comparator* bytewise;
static void InitModule() {
bytewise = new BytewiseComparatorImpl;
}
const Comparator* BytewiseComparator() {
port::InitOnce(&once, InitModule);
return bytewise;
}