mdbx: refine includes, drop midl.h and mdbx_osal.h

mdbx.h

@@ -49,14 +49,108 @@
 #ifndef LIBMDBX_H
 #define LIBMDBX_H
 
+/*--------------------------------------------------------------------------*/
+
+#ifdef _MSC_VER
+#pragma warning(push, 1)
+#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) */
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#if defined(_WIN32) || defined(_WIN64)
+
+#include <windows.h>
+#include <winnt.h>
+typedef unsigned mode_t;
+typedef HANDLE mdbx_filehandle_t;
+typedef DWORD mdbx_pid_t;
+typedef DWORD mdbx_tid_t;
+#define MDBX_ENODATA ERROR_HANDLE_EOF
+#define MDBX_EINVAL ERROR_INVALID_PARAMETER
+#define MDBX_EACCESS ERROR_ACCESS_DENIED
+#define MDBX_ENOMEM ERROR_OUTOFMEMORY
+#define MDBX_EROFS ERROR_FILE_READ_ONLY
+#define MDBX_ENOSYS ERROR_NOT_SUPPORTED
+#define MDBX_EIO ERROR_WRITE_FAULT
+
+#else
+
+#include <errno.h>     /* for error codes */
+#include <pthread.h>   /* for pthread_t */
+#include <sys/types.h> /* for pid_t */
+#include <sys/uio.h>   /* for truct iovec */
+#define HAVE_STRUCT_IOVEC 1
+typedef int mdbx_filehandle_t;
+typedef pid_t mdbx_pid_t;
+typedef pthread_t mdbx_tid_t;
+#define MDBX_ENODATA ENODATA
+#define MDBX_EINVAL EINVAL
+#define MDBX_EACCESS EACCES
+#define MDBX_ENOMEM ENOMEM
+#define MDBX_EROFS EROFS
+#define MDBX_ENOSYS ENOSYS
+#define MDBX_EIO EIO
+#endif
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+/*--------------------------------------------------------------------------*/
+
+#ifndef __has_attribute
+#define __has_attribute(x) (0)
+#endif
+
+#ifndef __dll_export
+#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(__GNUC__) || __has_attribute(dllexport)
+#define __dll_export __attribute__((dllexport))
+#elif defined(_MSC_VER)
+#define __dll_export __declspec(dllexport)
+#else
+#define __dll_export
+#endif
+#elif defined(__GNUC__) || __has_attribute(visibility)
+#define __dll_export __attribute__((visibility("default")))
+#else
+#define __dll_export
+#endif
+#endif /* __dll_export */
+
+#ifndef __dll_import
+#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(__GNUC__) || __has_attribute(dllimport)
+#define __dll_import __attribute__((dllimport))
+#elif defined(_MSC_VER)
+#define __dll_import __declspec(dllimport)
+#else
+#define __dll_import
+#endif
+#else
+#define __dll_import
+#endif
+#endif /* __dll_import */
+
+/*--------------------------------------------------------------------------*/
+
 #define MDBX_VERSION_MAJOR 0
 #define MDBX_VERSION_MINOR 0
 
-#ifdef _MSC_VER
-#pragma warning(push)
-#endif
-
-#include "mdbx_osal.h"
+#if defined(LIBMDBX_EXPORTS)
+#define LIBMDBX_API __dll_export
+#elif defined(LIBMDBX_IMPORTS)
+#define LIBMDBX_API __dll_import
+#else
+#define LIBMDBX_API
+#endif /* LIBMDBX_API */
 
 #ifdef __cplusplus
 extern "C" {
@@ -1511,8 +1605,4 @@ LIBMDBX_API int mdbx_dbi_sequence(MDBX_txn *txn, MDBX_dbi dbi, uint64_t *result,
 }
 #endif
 
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
-
 #endif /* LIBMDBX_H */