environment.hpp

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#pragma once
#include <chainbase/pinnable_mapped_file.hpp>
#include <iomanip>
 
namespace chainbase {
 
constexpr size_t header_size = 1024;
constexpr uint64_t header_id = 0x3242444f49534f45ULL; //"SYSIODB2" little endian
 
struct environment  {
   environment() {
      strncpy(compiler, __VERSION__, sizeof(compiler)-1);
   }
 
   enum os_t : unsigned char {
      OS_LINUX,
      OS_MACOS,
      OS_WINDOWS,
      OS_OTHER
   };
   enum arch_t : unsigned char {
      ARCH_X86_64,
      ARCH_ARM,
      ARCH_RISCV,
      ARCH_OTHER
   };
 
   bool debug =
#ifndef NDEBUG
      true;
#else
      false;
#endif
   os_t os =
#if defined(__linux__)
      OS_LINUX;
#elif defined(__APPLE__)
      OS_MACOS;
#elif defined(_WIN32)
      OS_WINDOWS;
#else
      OS_OTHER;
#endif
   arch_t arch =
#if defined(__x86_64__)
      ARCH_X86_64;
#elif defined(__aarch64__)
      ARCH_ARM;
#elif defined(__riscv__)
      ARCH_RISCV;
#else
      ARCH_OTHER;
#endif
 
   unsigned boost_version = BOOST_VERSION;
   uint8_t reserved[512] = {};
   char compiler[256] = {};
 
   bool operator==(const environment& other) {
      return !memcmp(this, &other, sizeof(environment));
   } 
   bool operator!=(const environment& other) {
      return !(*this == other);
   }
} __attribute__ ((packed));
 
struct db_header  {
   uint64_t id = header_id;
   bool dirty = false;
   environment dbenviron;
} __attribute__ ((packed));
 
constexpr size_t header_dirty_bit_offset = offsetof(db_header, dirty);
 
static_assert(sizeof(db_header) <= header_size, "DB header struct too large");
 
std::ostream& operator<<(std::ostream& os, const chainbase::environment& dt);
 
}