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/* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */
/*
* Copyright 2015-2021 Leonid Yuriev <leo@yuriev.ru>
* and other libmdbx authors: please see AUTHORS file.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#pragma once
/*----------------------------------------------------------------------------*/
/* Microsoft compiler generates a lot of warning for self includes... */
#ifdef _MSC_VER
#pragma warning(push, 1)
#pragma warning(disable : 4548) /* expression before comma has no effect; \
expected expression with side - effect */
#pragma warning(disable : 4530) /* C++ exception handler used, but unwind \
* semantics are not enabled. Specify /EHsc */
#pragma warning(disable : 4577) /* 'noexcept' used with no exception handling \
* mode specified; termination on exception is \
* not guaranteed. Specify /EHsc */
#endif /* _MSC_VER (warnings) */
#if defined(_WIN32) || defined(_WIN64)
#if !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#if !defined(_NO_CRT_STDIO_INLINE) && MDBX_BUILD_SHARED_LIBRARY && \
!defined(xMDBX_TOOLS) && MDBX_WITHOUT_MSVC_CRT
#define _NO_CRT_STDIO_INLINE
#endif
#elif !defined(_POSIX_C_SOURCE)
#define _POSIX_C_SOURCE 200809L
#endif /* Windows */
/*----------------------------------------------------------------------------*/
/* C99 includes */
#include <inttypes.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <assert.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
/* C11 stdalign.h */
#if __has_include(<stdalign.h>)
#include <stdalign.h>
#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
#define alignas(N) _Alignas(N)
#elif defined(_MSC_VER)
#define alignas(N) __declspec(align(N))
#elif __has_attribute(__aligned__) || defined(__GNUC__)
#define alignas(N) __attribute__((__aligned__(N)))
#else
#error "FIXME: Required _alignas() or equivalent."
#endif
/*----------------------------------------------------------------------------*/
/* Systems includes */
#ifdef __APPLE__
#include <TargetConditionals.h>
#endif /* Apple OSX & iOS */
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
defined(__BSD__) || defined(__bsdi__) || defined(__DragonFly__) || \
defined(__APPLE__) || defined(__MACH__)
#include <sys/cdefs.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#if defined(__FreeBSD__) || defined(__DragonFly__)
#include <vm/vm_param.h>
#elif defined(__OpenBSD__) || defined(__NetBSD__)
#include <uvm/uvm_param.h>
#else
#define SYSCTL_LEGACY_NONCONST_MIB
#endif
#ifndef __MACH__
#include <sys/vmmeter.h>
#endif
#else
#include <malloc.h>
#if !(defined(__sun) || defined(__SVR4) || defined(__svr4__) || \
defined(_WIN32) || defined(_WIN64))
#include <mntent.h>
#endif /* !Solaris */
#endif /* !xBSD */
#if defined(__FreeBSD__) || __has_include(<malloc_np.h>)
#include <malloc_np.h>
#endif
#if defined(__APPLE__) || defined(__MACH__) || __has_include(<malloc/malloc.h>)
#include <malloc/malloc.h>
#endif /* MacOS */
#if defined(__MACH__)
#include <mach/host_info.h>
#include <mach/mach_host.h>
#include <mach/mach_port.h>
#include <uuid/uuid.h>
#undef P_DIRTY
#endif
#if defined(__linux__) || defined(__gnu_linux__)
#include <linux/sysctl.h>
#include <sched.h>
#include <sys/sendfile.h>
#include <sys/statfs.h>
#endif /* Linux */
#ifndef _XOPEN_SOURCE
#define _XOPEN_SOURCE 0
#endif
#ifndef _XOPEN_SOURCE_EXTENDED
#define _XOPEN_SOURCE_EXTENDED 0
#else
#include <utmpx.h>
#endif /* _XOPEN_SOURCE_EXTENDED */
#if defined(__sun) || defined(__SVR4) || defined(__svr4__)
#include <kstat.h>
#include <sys/mnttab.h>
/* On Solaris, it's easier to add a missing prototype rather than find a
* combination of #defines that break nothing. */
__extern_C key_t ftok(const char *, int);
#endif /* SunOS/Solaris */
#if defined(_WIN32) || defined(_WIN64)
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0601 /* Windows 7 */
#elif _WIN32_WINNT < 0x0500
#error At least 'Windows 2000' API is required for libmdbx.
#endif /* _WIN32_WINNT */
#if (defined(__MINGW32__) || defined(__MINGW64__)) && \
!defined(__USE_MINGW_ANSI_STDIO)
#define __USE_MINGW_ANSI_STDIO 1
#endif /* MinGW */
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif /* WIN32_LEAN_AND_MEAN */
#include <excpt.h>
#include <tlhelp32.h>
#include <windows.h>
#include <winnt.h>
#include <winternl.h>
#define HAVE_SYS_STAT_H
#define HAVE_SYS_TYPES_H
typedef HANDLE mdbx_thread_t;
typedef unsigned mdbx_thread_key_t;
#define MAP_FAILED NULL
#define HIGH_DWORD(v) ((DWORD)((sizeof(v) > 4) ? ((uint64_t)(v) >> 32) : 0))
#define THREAD_CALL WINAPI
#define THREAD_RESULT DWORD
typedef struct {
HANDLE mutex;
HANDLE event[2];
} mdbx_condpair_t;
typedef CRITICAL_SECTION mdbx_fastmutex_t;
#if !defined(_MSC_VER) && !defined(__try)
/* *INDENT-OFF* */
/* clang-format off */
#define __try
#define __except(COND) if(false)
/* *INDENT-ON* */
/* clang-format on */
#endif /* stub for MSVC's __try/__except */
#if MDBX_WITHOUT_MSVC_CRT
#ifndef mdbx_malloc
static inline void *mdbx_malloc(size_t bytes) {
return HeapAlloc(GetProcessHeap(), 0, bytes);
}
#endif /* mdbx_malloc */
#ifndef mdbx_calloc
static inline void *mdbx_calloc(size_t nelem, size_t size) {
return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, nelem * size);
}
#endif /* mdbx_calloc */
#ifndef mdbx_realloc
static inline void *mdbx_realloc(void *ptr, size_t bytes) {
return ptr ? HeapReAlloc(GetProcessHeap(), 0, ptr, bytes)
: HeapAlloc(GetProcessHeap(), 0, bytes);
}
#endif /* mdbx_realloc */
#ifndef mdbx_free
static inline void mdbx_free(void *ptr) { HeapFree(GetProcessHeap(), 0, ptr); }
#endif /* mdbx_free */
#else /* MDBX_WITHOUT_MSVC_CRT */
#define mdbx_malloc malloc
#define mdbx_calloc calloc
#define mdbx_realloc realloc
#define mdbx_free free
#define mdbx_strdup _strdup
#endif /* MDBX_WITHOUT_MSVC_CRT */
#ifndef snprintf
#define snprintf _snprintf /* ntdll */
#endif
#ifndef vsnprintf
#define vsnprintf _vsnprintf /* ntdll */
#endif
#else /*----------------------------------------------------------------------*/
#include <unistd.h>
#if !defined(_POSIX_MAPPED_FILES) || _POSIX_MAPPED_FILES < 1
#error "libmdbx requires the _POSIX_MAPPED_FILES feature"
#endif /* _POSIX_MAPPED_FILES */
#include <pthread.h>
#include <semaphore.h>
#include <signal.h>
#include <sys/file.h>
#include <sys/ipc.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/uio.h>
typedef pthread_t mdbx_thread_t;
typedef pthread_key_t mdbx_thread_key_t;
#define INVALID_HANDLE_VALUE (-1)
#define THREAD_CALL
#define THREAD_RESULT void *
typedef struct {
pthread_mutex_t mutex;
pthread_cond_t cond[2];
} mdbx_condpair_t;
typedef pthread_mutex_t mdbx_fastmutex_t;
#define mdbx_malloc malloc
#define mdbx_calloc calloc
#define mdbx_realloc realloc
#define mdbx_free free
#define mdbx_strdup strdup
#endif /* Platform */
#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size)
/* malloc_usable_size() already provided */
#elif defined(__APPLE__)
#define malloc_usable_size(ptr) malloc_size(ptr)
#elif defined(_MSC_VER) && !MDBX_WITHOUT_MSVC_CRT
#define malloc_usable_size(ptr) _msize(ptr)
#endif /* malloc_usable_size */
#ifdef __ANDROID_API__
#include <android/log.h>
#if __ANDROID_API__ >= 21
#include <sys/sendfile.h>
#endif
#endif /* Android */
/* *INDENT-OFF* */
/* clang-format off */
#if defined(HAVE_SYS_STAT_H) || __has_include(<sys/stat.h>)
#include <sys/stat.h>
#endif
#if defined(HAVE_SYS_TYPES_H) || __has_include(<sys/types.h>)
#include <sys/types.h>
#endif
#if defined(HAVE_SYS_FILE_H) || __has_include(<sys/file.h>)
#include <sys/file.h>
#endif
/* *INDENT-ON* */
/* clang-format on */
#ifndef SSIZE_MAX
#define SSIZE_MAX INTPTR_MAX
#endif
#if !defined(MADV_DODUMP) && defined(MADV_CORE)
#define MADV_DODUMP MADV_CORE
#endif /* MADV_CORE -> MADV_DODUMP */
#if !defined(MADV_DONTDUMP) && defined(MADV_NOCORE)
#define MADV_DONTDUMP MADV_NOCORE
#endif /* MADV_NOCORE -> MADV_DONTDUMP */
#if defined(i386) || defined(__386) || defined(__i386) || defined(__i386__) || \
defined(i486) || defined(__i486) || defined(__i486__) || \
defined(i586) | defined(__i586) || defined(__i586__) || defined(i686) || \
defined(__i686) || defined(__i686__) || defined(_M_IX86) || \
defined(_X86_) || defined(__THW_INTEL__) || defined(__I86__) || \
defined(__INTEL__) || defined(__x86_64) || defined(__x86_64__) || \
defined(__amd64__) || defined(__amd64) || defined(_M_X64) || \
defined(_M_AMD64) || defined(__IA32__) || defined(__INTEL__)
#ifndef __ia32__
/* LY: define neutral __ia32__ for x86 and x86-64 */
#define __ia32__ 1
#endif /* __ia32__ */
#if !defined(__amd64__) && (defined(__x86_64) || defined(__x86_64__) || \
defined(__amd64) || defined(_M_X64))
/* LY: define trusty __amd64__ for all AMD64/x86-64 arch */
#define __amd64__ 1
#endif /* __amd64__ */
#endif /* all x86 */
#if (-6 & 5) || CHAR_BIT != 8 || UINT_MAX < 0xffffffff || ULONG_MAX % 0xFFFF
#error \
"Sanity checking failed: Two's complement, reasonably sized integer types"
#endif
#if UINTPTR_MAX > 0xffffFFFFul || ULONG_MAX > 0xffffFFFFul
#define MDBX_WORDBITS 64
#else
#define MDBX_WORDBITS 32
#endif /* MDBX_WORDBITS */
/*----------------------------------------------------------------------------*/
/* Compiler's includes for builtins/intrinsics */
#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
#include <intrin.h>
#elif __GNUC_PREREQ(4, 4) || defined(__clang__)
#if defined(__ia32__) || defined(__e2k__)
#include <x86intrin.h>
#endif /* __ia32__ */
#if defined(__ia32__)
#include <cpuid.h>
#endif /* __ia32__ */
#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun)
#include <mbarrier.h>
#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \
(defined(HP_IA64) || defined(__ia64))
#include <machine/sys/inline.h>
#elif defined(__IBMC__) && defined(__powerpc)
#include <atomic.h>
#elif defined(_AIX)
#include <builtins.h>
#include <sys/atomic_op.h>
#elif (defined(__osf__) && defined(__DECC)) || defined(__alpha)
#include <c_asm.h>
#include <machine/builtins.h>
#elif defined(__MWERKS__)
/* CodeWarrior - troubles ? */
#pragma gcc_extensions
#elif defined(__SNC__)
/* Sony PS3 - troubles ? */
#elif defined(__hppa__) || defined(__hppa)
#include <machine/inline.h>
#else
#error Unsupported C compiler, please use GNU C 4.4 or newer
#endif /* Compiler */
/*----------------------------------------------------------------------------*/
/* Byteorder */
#if !defined(__BYTE_ORDER__) || !defined(__ORDER_LITTLE_ENDIAN__) || \
!defined(__ORDER_BIG_ENDIAN__)
/* *INDENT-OFF* */
/* clang-format off */
#if defined(__GLIBC__) || defined(__GNU_LIBRARY__) || defined(__ANDROID_API__) || \
defined(HAVE_ENDIAN_H) || __has_include(<endian.h>)
#include <endian.h>
#elif defined(__APPLE__) || defined(__MACH__) || defined(__OpenBSD__) || \
defined(HAVE_MACHINE_ENDIAN_H) || __has_include(<machine/endian.h>)
#include <machine/endian.h>
#elif defined(HAVE_SYS_ISA_DEFS_H) || __has_include(<sys/isa_defs.h>)
#include <sys/isa_defs.h>
#elif (defined(HAVE_SYS_TYPES_H) && defined(HAVE_SYS_ENDIAN_H)) || \
(__has_include(<sys/types.h>) && __has_include(<sys/endian.h>))
#include <sys/endian.h>
#include <sys/types.h>
#elif defined(__bsdi__) || defined(__DragonFly__) || defined(__FreeBSD__) || \
defined(__NetBSD__) || \
defined(HAVE_SYS_PARAM_H) || __has_include(<sys/param.h>)
#include <sys/param.h>
#endif /* OS */
/* *INDENT-ON* */
/* clang-format on */
#if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN)
#define __ORDER_LITTLE_ENDIAN__ __LITTLE_ENDIAN
#define __ORDER_BIG_ENDIAN__ __BIG_ENDIAN
#define __BYTE_ORDER__ __BYTE_ORDER
#elif defined(_BYTE_ORDER) && defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN)
#define __ORDER_LITTLE_ENDIAN__ _LITTLE_ENDIAN
#define __ORDER_BIG_ENDIAN__ _BIG_ENDIAN
#define __BYTE_ORDER__ _BYTE_ORDER
#else
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __ORDER_BIG_ENDIAN__ 4321
#if defined(__LITTLE_ENDIAN__) || \
(defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)) || \
defined(__ARMEL__) || defined(__THUMBEL__) || defined(__AARCH64EL__) || \
defined(__MIPSEL__) || defined(_MIPSEL) || defined(__MIPSEL) || \
defined(_M_ARM) || defined(_M_ARM64) || defined(__e2k__) || \
defined(__elbrus_4c__) || defined(__elbrus_8c__) || defined(__bfin__) || \
defined(__BFIN__) || defined(__ia64__) || defined(_IA64) || \
defined(__IA64__) || defined(__ia64) || defined(_M_IA64) || \
defined(__itanium__) || defined(__ia32__) || defined(__CYGWIN__) || \
defined(_WIN64) || defined(_WIN32) || defined(__TOS_WIN__) || \
defined(__WINDOWS__)
#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
#elif defined(__BIG_ENDIAN__) || \
(defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)) || \
defined(__ARMEB__) || defined(__THUMBEB__) || defined(__AARCH64EB__) || \
defined(__MIPSEB__) || defined(_MIPSEB) || defined(__MIPSEB) || \
defined(__m68k__) || defined(M68000) || defined(__hppa__) || \
defined(__hppa) || defined(__HPPA__) || defined(__sparc__) || \
defined(__sparc) || defined(__370__) || defined(__THW_370__) || \
defined(__s390__) || defined(__s390x__) || defined(__SYSC_ZARCH__)
#define __BYTE_ORDER__ __ORDER_BIG_ENDIAN__
#else
#error __BYTE_ORDER__ should be defined.
#endif /* Arch */
#endif
#endif /* __BYTE_ORDER__ || __ORDER_LITTLE_ENDIAN__ || __ORDER_BIG_ENDIAN__ */
/* Get the size of a memory page for the system.
* This is the basic size that the platform's memory manager uses, and is
* fundamental to the use of memory-mapped files. */
MDBX_MAYBE_UNUSED MDBX_NOTHROW_CONST_FUNCTION static __inline size_t
mdbx_syspagesize(void) {
#if defined(_WIN32) || defined(_WIN64)
SYSTEM_INFO si;
GetSystemInfo(&si);
return si.dwPageSize;
#else
return sysconf(_SC_PAGE_SIZE);
#endif
}
typedef struct mdbx_mmap_param {
union {
void *address;
uint8_t *dxb;
struct MDBX_lockinfo *lck;
};
mdbx_filehandle_t fd;
size_t limit; /* mapping length, but NOT a size of file nor DB */
size_t current; /* mapped region size, i.e. the size of file and DB */
uint64_t filesize /* in-process cache of a file size */;
#if defined(_WIN32) || defined(_WIN64)
HANDLE section; /* memory-mapped section handle */
#endif
} mdbx_mmap_t;
typedef union bin128 {
__anonymous_struct_extension__ struct { uint64_t x, y; };
__anonymous_struct_extension__ struct { uint32_t a, b, c, d; };
} bin128_t;
#if defined(_WIN32) || defined(_WIN64)
typedef union MDBX_srwlock {
struct {
long volatile readerCount;
long volatile writerCount;
};
RTL_SRWLOCK native;
} MDBX_srwlock;
#endif /* Windows */
#ifdef __cplusplus
extern void mdbx_osal_jitter(bool tiny);
#else
/*----------------------------------------------------------------------------*/
/* Atomics */
#if defined(__cplusplus) && !defined(__STDC_NO_ATOMICS__) && (__has_include(<cstdatomic>) || __has_extension(cxx_atomic))
#include <cstdatomic>
#define MDBX_HAVE_C11ATOMICS
#elif !defined(__cplusplus) && \
(__STDC_VERSION__ >= 201112L || __has_extension(c_atomic)) && \
!defined(__STDC_NO_ATOMICS__) && \
(__GNUC_PREREQ(4, 9) || __CLANG_PREREQ(3, 8) || \
!(defined(__GNUC__) || defined(__clang__)))
#include <stdatomic.h>
#define MDBX_HAVE_C11ATOMICS
#elif defined(__GNUC__) || defined(__clang__)
#elif defined(_MSC_VER)
#pragma warning(disable : 4163) /* 'xyz': not available as an intrinsic */
#pragma warning(disable : 4133) /* 'function': incompatible types - from \
'size_t' to 'LONGLONG' */
#pragma warning(disable : 4244) /* 'return': conversion from 'LONGLONG' to \
'std::size_t', possible loss of data */
#pragma warning(disable : 4267) /* 'function': conversion from 'size_t' to \
'long', possible loss of data */
#pragma intrinsic(_InterlockedExchangeAdd, _InterlockedCompareExchange)
#pragma intrinsic(_InterlockedExchangeAdd64, _InterlockedCompareExchange64)
#elif defined(__APPLE__)
#include <libkern/OSAtomic.h>
#else
#error FIXME atomic-ops
#endif
/*----------------------------------------------------------------------------*/
/* Memory/Compiler barriers, cache coherence */
#if __has_include(<sys/cachectl.h>)
#include <sys/cachectl.h>
#elif defined(__mips) || defined(__mips__) || defined(__mips64) || \
defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) || \
defined(__MWERKS__) || defined(__sgi)
/* MIPS should have explicit cache control */
#include <sys/cachectl.h>
#endif
MDBX_MAYBE_UNUSED static __inline void mdbx_compiler_barrier(void) {
#if defined(__clang__) || defined(__GNUC__)
__asm__ __volatile__("" ::: "memory");
#elif defined(_MSC_VER)
_ReadWriteBarrier();
#elif defined(__INTEL_COMPILER) /* LY: Intel Compiler may mimic GCC and MSC */
__memory_barrier();
#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun)
__compiler_barrier();
#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \
(defined(HP_IA64) || defined(__ia64))
_Asm_sched_fence(/* LY: no-arg meaning 'all expect ALU', e.g. 0x3D3D */);
#elif defined(_AIX) || defined(__ppc__) || defined(__powerpc__) || \
defined(__ppc64__) || defined(__powerpc64__)
__fence();
#else
#error "Could not guess the kind of compiler, please report to us."
#endif
}
MDBX_MAYBE_UNUSED static __inline void mdbx_memory_barrier(void) {
#ifdef MDBX_HAVE_C11ATOMICS
atomic_thread_fence(memory_order_seq_cst);
#elif defined(__ATOMIC_SEQ_CST)
#ifdef __clang__
__c11_atomic_thread_fence(__ATOMIC_SEQ_CST);
#else
__atomic_thread_fence(__ATOMIC_SEQ_CST);
#endif
#elif defined(__clang__) || defined(__GNUC__)
__sync_synchronize();
#elif defined(_WIN32) || defined(_WIN64)
MemoryBarrier();
#elif defined(__INTEL_COMPILER) /* LY: Intel Compiler may mimic GCC and MSC */
#if defined(__ia32__)
_mm_mfence();
#else
__mf();
#endif
#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun)
__machine_rw_barrier();
#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \
(defined(HP_IA64) || defined(__ia64))
_Asm_mf();
#elif defined(_AIX) || defined(__ppc__) || defined(__powerpc__) || \
defined(__ppc64__) || defined(__powerpc64__)
__lwsync();
#else
#error "Could not guess the kind of compiler, please report to us."
#endif
}
/*----------------------------------------------------------------------------*/
/* libc compatibility stuff */
#if (!defined(__GLIBC__) && __GLIBC_PREREQ(2, 1)) && \
(defined(_GNU_SOURCE) || defined(_BSD_SOURCE))
#define mdbx_asprintf asprintf
#define mdbx_vasprintf vasprintf
#else
MDBX_MAYBE_UNUSED MDBX_INTERNAL_FUNC
MDBX_PRINTF_ARGS(2, 3) int mdbx_asprintf(char **strp, const char *fmt, ...);
MDBX_INTERNAL_FUNC int mdbx_vasprintf(char **strp, const char *fmt, va_list ap);
#endif
/*----------------------------------------------------------------------------*/
/* OS abstraction layer stuff */
/* max bytes to write in one call */
#if defined(_WIN32) || defined(_WIN64)
#define MAX_WRITE UINT32_C(0x01000000)
#else
#define MAX_WRITE UINT32_C(0x3fff0000)
#endif
#if defined(__linux__) || defined(__gnu_linux__)
MDBX_INTERNAL_VAR uint32_t mdbx_linux_kernel_version;
MDBX_INTERNAL_VAR bool mdbx_RunningOnWSL1 /* Windows Subsystem 1 for Linux */;
#endif /* Linux */
#ifndef mdbx_strdup
LIBMDBX_API char *mdbx_strdup(const char *str);
#endif
MDBX_MAYBE_UNUSED static __inline int mdbx_get_errno(void) {
#if defined(_WIN32) || defined(_WIN64)
DWORD rc = GetLastError();
#else
int rc = errno;
#endif
return rc;
}
#ifndef mdbx_memalign_alloc
MDBX_INTERNAL_FUNC int mdbx_memalign_alloc(size_t alignment, size_t bytes,
void **result);
#endif
#ifndef mdbx_memalign_free
MDBX_INTERNAL_FUNC void mdbx_memalign_free(void *ptr);
#endif
MDBX_INTERNAL_FUNC int mdbx_condpair_init(mdbx_condpair_t *condpair);
MDBX_INTERNAL_FUNC int mdbx_condpair_lock(mdbx_condpair_t *condpair);
MDBX_INTERNAL_FUNC int mdbx_condpair_unlock(mdbx_condpair_t *condpair);
MDBX_INTERNAL_FUNC int mdbx_condpair_signal(mdbx_condpair_t *condpair,
bool part);
MDBX_INTERNAL_FUNC int mdbx_condpair_wait(mdbx_condpair_t *condpair, bool part);
MDBX_INTERNAL_FUNC int mdbx_condpair_destroy(mdbx_condpair_t *condpair);
MDBX_INTERNAL_FUNC int mdbx_fastmutex_init(mdbx_fastmutex_t *fastmutex);
MDBX_INTERNAL_FUNC int mdbx_fastmutex_acquire(mdbx_fastmutex_t *fastmutex);
MDBX_INTERNAL_FUNC int mdbx_fastmutex_release(mdbx_fastmutex_t *fastmutex);
MDBX_INTERNAL_FUNC int mdbx_fastmutex_destroy(mdbx_fastmutex_t *fastmutex);
MDBX_INTERNAL_FUNC int mdbx_pwritev(mdbx_filehandle_t fd, struct iovec *iov,
int iovcnt, uint64_t offset,
size_t expected_written);
MDBX_INTERNAL_FUNC int mdbx_pread(mdbx_filehandle_t fd, void *buf, size_t count,
uint64_t offset);
MDBX_INTERNAL_FUNC int mdbx_pwrite(mdbx_filehandle_t fd, const void *buf,
size_t count, uint64_t offset);
MDBX_INTERNAL_FUNC int mdbx_write(mdbx_filehandle_t fd, const void *buf,
size_t count);
MDBX_INTERNAL_FUNC int
mdbx_thread_create(mdbx_thread_t *thread,
THREAD_RESULT(THREAD_CALL *start_routine)(void *),
void *arg);
MDBX_INTERNAL_FUNC int mdbx_thread_join(mdbx_thread_t thread);
enum mdbx_syncmode_bits {
MDBX_SYNC_NONE = 0,
MDBX_SYNC_DATA = 1,
MDBX_SYNC_SIZE = 2,
MDBX_SYNC_IODQ = 4
};
MDBX_INTERNAL_FUNC int mdbx_fsync(mdbx_filehandle_t fd,
const enum mdbx_syncmode_bits mode_bits);
MDBX_INTERNAL_FUNC int mdbx_ftruncate(mdbx_filehandle_t fd, uint64_t length);
MDBX_INTERNAL_FUNC int mdbx_fseek(mdbx_filehandle_t fd, uint64_t pos);
MDBX_INTERNAL_FUNC int mdbx_filesize(mdbx_filehandle_t fd, uint64_t *length);
enum mdbx_openfile_purpose {
MDBX_OPEN_DXB_READ = 0,
MDBX_OPEN_DXB_LAZY = 1,
MDBX_OPEN_DXB_DSYNC = 2,
MDBX_OPEN_LCK = 3,
MDBX_OPEN_COPY = 4,
MDBX_OPEN_DELETE = 5
};
MDBX_INTERNAL_FUNC int mdbx_openfile(const enum mdbx_openfile_purpose purpose,
const MDBX_env *env, const char *pathname,
mdbx_filehandle_t *fd,
mdbx_mode_t unix_mode_bits);
MDBX_INTERNAL_FUNC int mdbx_closefile(mdbx_filehandle_t fd);
MDBX_INTERNAL_FUNC int mdbx_removefile(const char *pathname);
MDBX_INTERNAL_FUNC int mdbx_removedirectory(const char *pathname);
MDBX_INTERNAL_FUNC int mdbx_is_pipe(mdbx_filehandle_t fd);
MDBX_INTERNAL_FUNC int mdbx_lockfile(mdbx_filehandle_t fd, bool wait);
#define MMAP_OPTION_TRUNCATE 1
#define MMAP_OPTION_SEMAPHORE 2
MDBX_INTERNAL_FUNC int mdbx_mmap(const int flags, mdbx_mmap_t *map,
const size_t must, const size_t limit,
const unsigned options);
MDBX_INTERNAL_FUNC int mdbx_munmap(mdbx_mmap_t *map);
#define MDBX_MRESIZE_MAY_MOVE 0x00000100
#define MDBX_MRESIZE_MAY_UNMAP 0x00000200
MDBX_INTERNAL_FUNC int mdbx_mresize(const int flags, mdbx_mmap_t *map,
size_t size, size_t limit);
#if defined(_WIN32) || defined(_WIN64)
typedef struct {
unsigned limit, count;
HANDLE handles[31];
} mdbx_handle_array_t;
MDBX_INTERNAL_FUNC int
mdbx_suspend_threads_before_remap(MDBX_env *env, mdbx_handle_array_t **array);
MDBX_INTERNAL_FUNC int
mdbx_resume_threads_after_remap(mdbx_handle_array_t *array);
#endif /* Windows */
MDBX_INTERNAL_FUNC int mdbx_msync(mdbx_mmap_t *map, size_t offset,
size_t length,
enum mdbx_syncmode_bits mode_bits);
MDBX_INTERNAL_FUNC int mdbx_check_fs_rdonly(mdbx_filehandle_t handle,
const char *pathname, int err);
MDBX_MAYBE_UNUSED static __inline uint32_t mdbx_getpid(void) {
STATIC_ASSERT(sizeof(mdbx_pid_t) <= sizeof(uint32_t));
#if defined(_WIN32) || defined(_WIN64)
return GetCurrentProcessId();
#else
return getpid();
#endif
}
MDBX_MAYBE_UNUSED static __inline uintptr_t mdbx_thread_self(void) {
mdbx_tid_t thunk;
STATIC_ASSERT(sizeof(uintptr_t) >= sizeof(thunk));
#if defined(_WIN32) || defined(_WIN64)
thunk = GetCurrentThreadId();
#else
thunk = pthread_self();
#endif
return (uintptr_t)thunk;
}
MDBX_MAYBE_UNUSED MDBX_INTERNAL_FUNC void mdbx_osal_jitter(bool tiny);
MDBX_INTERNAL_FUNC uint64_t mdbx_osal_monotime(void);
MDBX_INTERNAL_FUNC uint64_t
mdbx_osal_16dot16_to_monotime(uint32_t seconds_16dot16);
MDBX_INTERNAL_FUNC uint32_t mdbx_osal_monotime_to_16dot16(uint64_t monotime);
MDBX_INTERNAL_FUNC bin128_t mdbx_osal_bootid(void);
/*----------------------------------------------------------------------------*/
/* lck stuff */
/// \brief Initialization of synchronization primitives linked with MDBX_env
/// instance both in LCK-file and within the current process.
/// \param
/// global_uniqueness_flag = true - denotes that there are no other processes
/// working with DB and LCK-file. Thus the function MUST initialize
/// shared synchronization objects in memory-mapped LCK-file.
/// global_uniqueness_flag = false - denotes that at least one process is
/// already working with DB and LCK-file, including the case when DB
/// has already been opened in the current process. Thus the function
/// MUST NOT initialize shared synchronization objects in memory-mapped
/// LCK-file that are already in use.
/// \return Error code or zero on success.
MDBX_INTERNAL_FUNC int mdbx_lck_init(MDBX_env *env,
MDBX_env *inprocess_neighbor,
int global_uniqueness_flag);
/// \brief Disconnects from shared interprocess objects and destructs
/// synchronization objects linked with MDBX_env instance
/// within the current process.
/// \param
/// inprocess_neighbor = NULL - if the current process does not have other
/// instances of MDBX_env linked with the DB being closed.
/// Thus the function MUST check for other processes working with DB or
/// LCK-file, and keep or destroy shared synchronization objects in
/// memory-mapped LCK-file depending on the result.
/// inprocess_neighbor = not-NULL - pointer to another instance of MDBX_env
/// (anyone of there is several) working with DB or LCK-file within the
/// current process. Thus the function MUST NOT try to acquire exclusive
/// lock and/or try to destruct shared synchronization objects linked with
/// DB or LCK-file. Moreover, the implementation MUST ensure correct work
/// of other instances of MDBX_env within the current process, e.g.
/// restore POSIX-fcntl locks after the closing of file descriptors.
/// \return Error code (MDBX_PANIC) or zero on success.
MDBX_INTERNAL_FUNC int mdbx_lck_destroy(MDBX_env *env,
MDBX_env *inprocess_neighbor);
/// \brief Connects to shared interprocess locking objects and tries to acquire
/// the maximum lock level (shared if exclusive is not available)
/// Depending on implementation or/and platform (Windows) this function may
/// acquire the non-OS super-level lock (e.g. for shared synchronization
/// objects initialization), which will be downgraded to OS-exclusive or
/// shared via explicit calling of mdbx_lck_downgrade().
/// \return
/// MDBX_RESULT_TRUE (-1) - if an exclusive lock was acquired and thus
/// the current process is the first and only after the last use of DB.
/// MDBX_RESULT_FALSE (0) - if a shared lock was acquired and thus
/// DB has already been opened and now is used by other processes.
/// Otherwise (not 0 and not -1) - error code.
MDBX_INTERNAL_FUNC int mdbx_lck_seize(MDBX_env *env);
/// \brief Downgrades the level of initially acquired lock to
/// operational level specified by argument. The reson for such downgrade:
/// - unblocking of other processes that are waiting for access, i.e.
/// if (env->me_flags & MDBX_EXCLUSIVE) != 0, then other processes
/// should be made aware that access is unavailable rather than
/// wait for it.
/// - freeing locks that interfere file operation (especially for Windows)
/// (env->me_flags & MDBX_EXCLUSIVE) == 0 - downgrade to shared lock.
/// (env->me_flags & MDBX_EXCLUSIVE) != 0 - downgrade to exclusive
/// operational lock.
/// \return Error code or zero on success
MDBX_INTERNAL_FUNC int mdbx_lck_downgrade(MDBX_env *env);
/// \brief Locks LCK-file or/and table of readers for (de)registering.
/// \return Error code or zero on success
MDBX_INTERNAL_FUNC int mdbx_rdt_lock(MDBX_env *env);
/// \brief Unlocks LCK-file or/and table of readers after (de)registering.
MDBX_INTERNAL_FUNC void mdbx_rdt_unlock(MDBX_env *env);
/// \brief Acquires lock for DB change (on writing transaction start)
/// Reading transactions will not be blocked.
/// Declared as LIBMDBX_API because it is used in mdbx_chk.
/// \return Error code or zero on success
LIBMDBX_API int mdbx_txn_lock(MDBX_env *env, bool dont_wait);
/// \brief Releases lock once DB changes is made (after writing transaction
/// has finished).
/// Declared as LIBMDBX_API because it is used in mdbx_chk.
LIBMDBX_API void mdbx_txn_unlock(MDBX_env *env);
/// \brief Sets alive-flag of reader presence (indicative lock) for PID of
/// the current process. The function does no more than needed for
/// the correct working of mdbx_rpid_check() in other processes.
/// \return Error code or zero on success
MDBX_INTERNAL_FUNC int mdbx_rpid_set(MDBX_env *env);
/// \brief Resets alive-flag of reader presence (indicative lock)
/// for PID of the current process. The function does no more than needed
/// for the correct working of mdbx_rpid_check() in other processes.
/// \return Error code or zero on success
MDBX_INTERNAL_FUNC int mdbx_rpid_clear(MDBX_env *env);
/// \brief Checks for reading process status with the given pid with help of
/// alive-flag of presence (indicative lock) or using another way.
/// \return
/// MDBX_RESULT_TRUE (-1) - if the reader process with the given PID is alive
/// and working with DB (indicative lock is present).
/// MDBX_RESULT_FALSE (0) - if the reader process with the given PID is absent
/// or not working with DB (indicative lock is not present).
/// Otherwise (not 0 and not -1) - error code.
MDBX_INTERNAL_FUNC int mdbx_rpid_check(MDBX_env *env, uint32_t pid);
#if defined(_WIN32) || defined(_WIN64)
typedef void(WINAPI *MDBX_srwlock_function)(MDBX_srwlock *);
MDBX_INTERNAL_VAR MDBX_srwlock_function mdbx_srwlock_Init,
mdbx_srwlock_AcquireShared, mdbx_srwlock_ReleaseShared,
mdbx_srwlock_AcquireExclusive, mdbx_srwlock_ReleaseExclusive;
#if _WIN32_WINNT < 0x0600 /* prior to Windows Vista */
typedef enum _FILE_INFO_BY_HANDLE_CLASS {
FileBasicInfo,
FileStandardInfo,
FileNameInfo,
FileRenameInfo,
FileDispositionInfo,
FileAllocationInfo,
FileEndOfFileInfo,
FileStreamInfo,
FileCompressionInfo,
FileAttributeTagInfo,
FileIdBothDirectoryInfo,
FileIdBothDirectoryRestartInfo,
FileIoPriorityHintInfo,
FileRemoteProtocolInfo,
MaximumFileInfoByHandleClass
} FILE_INFO_BY_HANDLE_CLASS,
*PFILE_INFO_BY_HANDLE_CLASS;
typedef struct _FILE_END_OF_FILE_INFO {
LARGE_INTEGER EndOfFile;
} FILE_END_OF_FILE_INFO, *PFILE_END_OF_FILE_INFO;
#define REMOTE_PROTOCOL_INFO_FLAG_LOOPBACK 0x00000001
#define REMOTE_PROTOCOL_INFO_FLAG_OFFLINE 0x00000002
typedef struct _FILE_REMOTE_PROTOCOL_INFO {
USHORT StructureVersion;
USHORT StructureSize;
DWORD Protocol;
USHORT ProtocolMajorVersion;
USHORT ProtocolMinorVersion;
USHORT ProtocolRevision;
USHORT Reserved;
DWORD Flags;
struct {
DWORD Reserved[8];
} GenericReserved;
struct {
DWORD Reserved[16];
} ProtocolSpecificReserved;
} FILE_REMOTE_PROTOCOL_INFO, *PFILE_REMOTE_PROTOCOL_INFO;
#endif /* _WIN32_WINNT < 0x0600 (prior to Windows Vista) */
typedef BOOL(WINAPI *MDBX_GetFileInformationByHandleEx)(
_In_ HANDLE hFile, _In_ FILE_INFO_BY_HANDLE_CLASS FileInformationClass,
_Out_ LPVOID lpFileInformation, _In_ DWORD dwBufferSize);
MDBX_INTERNAL_VAR MDBX_GetFileInformationByHandleEx
mdbx_GetFileInformationByHandleEx;
typedef BOOL(WINAPI *MDBX_GetVolumeInformationByHandleW)(
_In_ HANDLE hFile, _Out_opt_ LPWSTR lpVolumeNameBuffer,
_In_ DWORD nVolumeNameSize, _Out_opt_ LPDWORD lpVolumeSerialNumber,
_Out_opt_ LPDWORD lpMaximumComponentLength,
_Out_opt_ LPDWORD lpFileSystemFlags,
_Out_opt_ LPWSTR lpFileSystemNameBuffer, _In_ DWORD nFileSystemNameSize);
MDBX_INTERNAL_VAR MDBX_GetVolumeInformationByHandleW
mdbx_GetVolumeInformationByHandleW;
typedef DWORD(WINAPI *MDBX_GetFinalPathNameByHandleW)(_In_ HANDLE hFile,
_Out_ LPWSTR lpszFilePath,
_In_ DWORD cchFilePath,
_In_ DWORD dwFlags);
MDBX_INTERNAL_VAR MDBX_GetFinalPathNameByHandleW mdbx_GetFinalPathNameByHandleW;
typedef BOOL(WINAPI *MDBX_SetFileInformationByHandle)(
_In_ HANDLE hFile, _In_ FILE_INFO_BY_HANDLE_CLASS FileInformationClass,
_Out_ LPVOID lpFileInformation, _In_ DWORD dwBufferSize);
MDBX_INTERNAL_VAR MDBX_SetFileInformationByHandle
mdbx_SetFileInformationByHandle;
typedef NTSTATUS(NTAPI *MDBX_NtFsControlFile)(
IN HANDLE FileHandle, IN OUT HANDLE Event,
IN OUT PVOID /* PIO_APC_ROUTINE */ ApcRoutine, IN OUT PVOID ApcContext,
OUT PIO_STATUS_BLOCK IoStatusBlock, IN ULONG FsControlCode,
IN OUT PVOID InputBuffer, IN ULONG InputBufferLength,
OUT OPTIONAL PVOID OutputBuffer, IN ULONG OutputBufferLength);
MDBX_INTERNAL_VAR MDBX_NtFsControlFile mdbx_NtFsControlFile;
typedef uint64_t(WINAPI *MDBX_GetTickCount64)(void);
MDBX_INTERNAL_VAR MDBX_GetTickCount64 mdbx_GetTickCount64;
#if !defined(_WIN32_WINNT_WIN8) || _WIN32_WINNT < _WIN32_WINNT_WIN8
typedef struct _WIN32_MEMORY_RANGE_ENTRY {
PVOID VirtualAddress;
SIZE_T NumberOfBytes;
} WIN32_MEMORY_RANGE_ENTRY, *PWIN32_MEMORY_RANGE_ENTRY;
#endif /* Windows 8.x */
typedef BOOL(WINAPI *MDBX_PrefetchVirtualMemory)(
HANDLE hProcess, ULONG_PTR NumberOfEntries,
PWIN32_MEMORY_RANGE_ENTRY VirtualAddresses, ULONG Flags);
MDBX_INTERNAL_VAR MDBX_PrefetchVirtualMemory mdbx_PrefetchVirtualMemory;
typedef enum _SECTION_INHERIT { ViewShare = 1, ViewUnmap = 2 } SECTION_INHERIT;
typedef NTSTATUS(NTAPI *MDBX_NtExtendSection)(IN HANDLE SectionHandle,
IN PLARGE_INTEGER NewSectionSize);
MDBX_INTERNAL_VAR MDBX_NtExtendSection mdbx_NtExtendSection;
static __inline bool mdbx_RunningUnderWine(void) {
return !mdbx_NtExtendSection;
}
typedef LSTATUS(WINAPI *MDBX_RegGetValueA)(HKEY hkey, LPCSTR lpSubKey,
LPCSTR lpValue, DWORD dwFlags,
LPDWORD pdwType, PVOID pvData,
LPDWORD pcbData);
MDBX_INTERNAL_VAR MDBX_RegGetValueA mdbx_RegGetValueA;
#endif /* Windows */
#endif /* !__cplusplus */
/*----------------------------------------------------------------------------*/
#if defined(_MSC_VER) && _MSC_VER >= 1900
/* LY: MSVC 2015/2017/2019 has buggy/inconsistent PRIuPTR/PRIxPTR macros
* for internal format-args checker. */
#undef PRIuPTR
#undef PRIiPTR
#undef PRIdPTR
#undef PRIxPTR
#define PRIuPTR "Iu"
#define PRIiPTR "Ii"
#define PRIdPTR "Id"
#define PRIxPTR "Ix"
#define PRIuSIZE "zu"
#define PRIiSIZE "zi"
#define PRIdSIZE "zd"
#define PRIxSIZE "zx"
#endif /* fix PRI*PTR for _MSC_VER */
#ifndef PRIuSIZE
#define PRIuSIZE PRIuPTR
#define PRIiSIZE PRIiPTR
#define PRIdSIZE PRIdPTR
#define PRIxSIZE PRIxPTR
#endif /* PRI*SIZE macros for MSVC */
#ifdef _MSC_VER
#pragma warning(pop)
#endif
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