Added thirdparty: boost library

thirdparty/include/boost/interprocess/sync/windows/sync_utils.hpp

@@ -0,0 +1,275 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
+// Software License, Version 1.0. (See accompanying file
+// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/libs/interprocess for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_INTERPROCESS_DETAIL_SYNC_UTILS_HPP
+#define BOOST_INTERPROCESS_DETAIL_SYNC_UTILS_HPP
+
+#ifndef BOOST_CONFIG_HPP
+#  include <boost/config.hpp>
+#endif
+#
+#if defined(BOOST_HAS_PRAGMA_ONCE)
+#  pragma once
+#endif
+
+#include <boost/interprocess/detail/config_begin.hpp>
+#include <boost/interprocess/detail/workaround.hpp>
+#include <boost/interprocess/detail/win32_api.hpp>
+#include <boost/interprocess/sync/spin/mutex.hpp>
+#include <boost/interprocess/exceptions.hpp>
+#include <boost/interprocess/sync/scoped_lock.hpp>
+#include <boost/interprocess/sync/windows/winapi_semaphore_wrapper.hpp>
+#include <boost/interprocess/sync/windows/winapi_mutex_wrapper.hpp>
+
+//Shield against external warnings
+#include <boost/interprocess/detail/config_external_begin.hpp>
+#include <boost/unordered/unordered_map.hpp>
+#include <boost/interprocess/detail/config_external_end.hpp>
+#include <boost/container/flat_map.hpp>
+
+#include <cstddef>
+
+namespace boost {
+namespace interprocess {
+namespace ipcdetail {
+
+inline bool bytes_to_str(const void *mem, const std::size_t mem_length, char *out_str, std::size_t &out_length)
+{
+   const std::size_t need_mem = mem_length*2+1;
+   if(out_length < need_mem){
+      out_length = need_mem;
+      return false;
+   }
+
+   const char Characters [] =
+      { '0', '1', '2', '3', '4', '5', '6', '7'
+      , '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+
+   std::size_t char_counter = 0;
+   const char *buf = (const char *)mem;
+   for(std::size_t i = 0; i != mem_length; ++i){
+      out_str[char_counter++] = Characters[(buf[i]&0xF0)>>4];
+      out_str[char_counter++] = Characters[(buf[i]&0x0F)];
+   }
+   out_str[char_counter] = 0;
+   return true;
+}
+
+inline bool bytes_to_str(const void *mem, const std::size_t mem_length, wchar_t *out_str, std::size_t &out_length)
+{
+   const std::size_t need_mem = mem_length*2+1;
+   if(out_length < need_mem){
+      out_length = need_mem;
+      return false;
+   }
+
+   const wchar_t Characters [] =
+      { L'0', L'1', L'2', L'3', L'4', L'5', L'6', L'7'
+      , L'8', L'9', L'A', L'B', L'C', L'D', L'E', L'F' };
+
+   std::size_t char_counter = 0;
+   const char *buf = (const char *)mem;
+   for(std::size_t i = 0; i != mem_length; ++i){
+      out_str[char_counter++] = Characters[(buf[i]&0xF0)>>4];
+      out_str[char_counter++] = Characters[(buf[i]&0x0F)];
+   }
+   out_str[char_counter] = 0;
+   return true;
+}
+
+class sync_id
+{
+   public:
+   typedef __int64 internal_type;
+   sync_id()
+   {  winapi::query_performance_counter(&rand_);  }
+
+   explicit sync_id(internal_type val)
+   {  rand_ = val;  }
+
+   const internal_type &internal_pod() const
+   {  return rand_;  }
+
+   internal_type &internal_pod()
+   {  return rand_;  }
+
+   friend std::size_t hash_value(const sync_id &m)
+   {  return boost::hash_value(m.rand_);  }
+
+   friend bool operator==(const sync_id &l, const sync_id &r)
+   {  return l.rand_ == r.rand_;  }
+
+   private:
+   internal_type rand_;
+};
+
+class sync_handles
+{
+   public:
+   enum type { MUTEX, SEMAPHORE };
+
+   private:
+
+   //key: id -> mapped: HANDLE. Hash map to allow efficient sync operations
+   typedef boost::unordered_map<sync_id, void*> umap_type;
+   //key: ordered address of the sync type -> iterator from umap_type. Ordered map to allow closing handles when unmapping
+   typedef boost::container::flat_map<const void*, umap_type::iterator> map_type;
+   static const std::size_t LengthOfGlobal = sizeof("Global\\boost.ipc")-1;
+   static const std::size_t StrSize        = LengthOfGlobal + (sizeof(sync_id)*2+1);
+   typedef char NameBuf[StrSize];
+
+   void fill_name(NameBuf &name, const sync_id &id)
+   {
+      const char *n = "Global\\boost.ipc";
+      std::size_t i = 0;
+      do{
+         name[i] = n[i];
+         ++i;
+      } while(n[i]);
+      std::size_t len = sizeof(NameBuf) - LengthOfGlobal;
+      bytes_to_str(&id.internal_pod(), sizeof(id.internal_pod()), &name[LengthOfGlobal], len);
+   }
+
+   void throw_if_error(void *hnd_val)
+   {
+      if(!hnd_val){
+         error_info err(static_cast<int>(winapi::get_last_error()));
+         throw interprocess_exception(err);
+      }
+   }
+
+   void* open_or_create_semaphore(const sync_id &id, unsigned int initial_count)
+   {
+      NameBuf name;
+      fill_name(name, id);
+      permissions unrestricted_security;
+      unrestricted_security.set_unrestricted();
+      winapi_semaphore_wrapper sem_wrapper;
+      bool created;
+      sem_wrapper.open_or_create
+         (name, (long)initial_count, winapi_semaphore_wrapper::MaxCount, unrestricted_security, created);
+      throw_if_error(sem_wrapper.handle());
+      return sem_wrapper.release();
+   }
+
+   void* open_or_create_mutex(const sync_id &id)
+   {
+      NameBuf name;
+      fill_name(name, id);
+      permissions unrestricted_security;
+      unrestricted_security.set_unrestricted();
+      winapi_mutex_wrapper mtx_wrapper;
+      mtx_wrapper.open_or_create(name, unrestricted_security);
+      throw_if_error(mtx_wrapper.handle());
+      return mtx_wrapper.release();
+   }
+
+   public:
+   sync_handles()
+      : num_handles_()
+   {}
+
+   ~sync_handles()
+   {
+      BOOST_ASSERT(num_handles_ == 0); //Sanity check that handle we don't leak handles
+   }
+
+   void *obtain_mutex(const sync_id &id, const void *mapping_address, bool *popen_created = 0)
+   {
+      umap_type::value_type v(id, (void*)0);
+      scoped_lock<spin_mutex> lock(mtx_);
+      umap_type::iterator it = umap_.insert(v).first;
+      void *&hnd_val = it->second;
+      if(!hnd_val){
+         BOOST_ASSERT(map_.find(mapping_address) == map_.end());
+         map_[mapping_address] = it;
+         hnd_val = open_or_create_mutex(id);
+         if(popen_created) *popen_created = true;
+         ++num_handles_;
+      }
+      else if(popen_created){
+         BOOST_ASSERT(map_.find(mapping_address) != map_.end());
+         *popen_created = false;
+      }
+
+      return hnd_val;
+   }
+
+   void *obtain_semaphore(const sync_id &id, const void *mapping_address, unsigned int initial_count, bool *popen_created = 0)
+   {
+      umap_type::value_type v(id, (void*)0);
+      scoped_lock<spin_mutex> lock(mtx_);
+      umap_type::iterator it = umap_.insert(v).first;
+      void *&hnd_val = it->second;
+      if(!hnd_val){
+         BOOST_ASSERT(map_.find(mapping_address) == map_.end());
+         map_[mapping_address] = it;
+         hnd_val = open_or_create_semaphore(id, initial_count);
+         if(popen_created) *popen_created = true;
+         ++num_handles_;
+      }
+      else if(popen_created){
+         BOOST_ASSERT(map_.find(mapping_address) != map_.end());
+         *popen_created = false;
+      }
+      return hnd_val;
+   }
+
+   void destroy_handle(const sync_id &id, const void *mapping_address)
+   {
+      scoped_lock<spin_mutex> lock(mtx_);
+      umap_type::iterator it = umap_.find(id);
+      umap_type::iterator itend = umap_.end();
+
+      if(it != itend){
+         winapi::close_handle(it->second);
+         --num_handles_;
+         std::size_t i = map_.erase(mapping_address);
+         (void)i;
+         BOOST_ASSERT(i == 1);   //The entry should be there
+         umap_.erase(it);
+      }
+   }
+
+   void destroy_syncs_in_range(const void *addr, std::size_t size)
+   {
+      const void *low_id(addr);
+      const void *hig_id(static_cast<const char*>(addr)+size);
+      scoped_lock<spin_mutex> lock(mtx_);
+      map_type::iterator itlow(map_.lower_bound(low_id)),
+                         ithig(map_.lower_bound(hig_id)),
+                         it(itlow);
+      for (; it != ithig; ++it){
+         umap_type::iterator uit = it->second; 
+         void * const hnd = uit->second;
+         umap_.erase(uit);
+         int ret = winapi::close_handle(hnd);
+         --num_handles_;
+         BOOST_ASSERT(ret != 0); (void)ret;  //Sanity check that handle was ok
+      }
+
+      map_.erase(itlow, ithig);
+   }
+
+   private:
+   spin_mutex mtx_;
+   umap_type umap_;
+   map_type map_;
+   std::size_t num_handles_;
+};
+
+
+}  //namespace ipcdetail {
+}  //namespace interprocess {
+}  //namespace boost {
+
+#include <boost/interprocess/detail/config_end.hpp>
+
+#endif   //BOOST_INTERPROCESS_DETAIL_SYNC_UTILS_HPP