From 7935630197c5cf9bb297b0cb3d82a51e7a5a17e1 Mon Sep 17 00:00:00 2001
From: oktonion <0oktonion0@gmail.com>
Date: Mon, 2 Mar 2020 11:01:52 +0300
Subject: [PATCH 1/3] fix of win file locks (classic return equal error)

---
 include/boost/interprocess/detail/os_file_functions.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/interprocess/detail/os_file_functions.hpp b/include/boost/interprocess/detail/os_file_functions.hpp
index 0eeb26e..198392a 100644
--- a/include/boost/interprocess/detail/os_file_functions.hpp
+++ b/include/boost/interprocess/detail/os_file_functions.hpp
@@ -239,7 +239,7 @@ inline bool try_acquire_file_lock(file_handle_t hnd, bool &acquired)
                acquired = false, true : false;
 
    }
-   return (acquired = true);
+   return (true == acquired);
 }
 
 inline bool release_file_lock(file_handle_t hnd)
@@ -268,7 +268,7 @@ inline bool try_acquire_file_lock_sharable(file_handle_t hnd, bool &acquired)
       return winapi::get_last_error() == winapi::error_lock_violation ?
                acquired = false, true : false;
    }
-   return (acquired = true);
+   return (true == acquired);
 }
 
 inline bool release_file_lock_sharable(file_handle_t hnd)

From 771e849faecdd4136dcd2fcea8c463144a1cde2f Mon Sep 17 00:00:00 2001
From: oktonion <0oktonion0@gmail.com>
Date: Mon, 2 Mar 2020 11:03:19 +0300
Subject: [PATCH 2/3] fix of WinAPI calls to (Un)LockFileEx

for WinAPI (Un)LockFileEx reserved value should always be zero, no matter what
---
 include/boost/interprocess/detail/win32_api.hpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/boost/interprocess/detail/win32_api.hpp b/include/boost/interprocess/detail/win32_api.hpp
index 4761713..38b5187 100644
--- a/include/boost/interprocess/detail/win32_api.hpp
+++ b/include/boost/interprocess/detail/win32_api.hpp
@@ -1454,11 +1454,11 @@ inline bool set_file_pointer_ex(void *handle, __int64 distance, __int64 *new_fil
    return 0 != SetFilePointerEx(handle, d, (large_integer*)new_file_pointer, move_method);
 }
 
-inline bool lock_file_ex(void *hnd, unsigned long flags, unsigned long reserved, unsigned long size_low, unsigned long size_high, interprocess_overlapped *overlapped)
-{  return 0 != LockFileEx(hnd, flags, reserved, size_low, size_high, overlapped); }
+inline bool lock_file_ex(void *hnd, unsigned long flags, unsigned long, unsigned long size_low, unsigned long size_high, interprocess_overlapped *overlapped)
+{  return 0 != LockFileEx(hnd, flags, 0, size_low, size_high, overlapped); }
 
-inline bool unlock_file_ex(void *hnd, unsigned long reserved, unsigned long size_low, unsigned long size_high, interprocess_overlapped *overlapped)
-{  return 0 != UnlockFileEx(hnd, reserved, size_low, size_high, overlapped);  }
+inline bool unlock_file_ex(void *hnd, unsigned long, unsigned long size_low, unsigned long size_high, interprocess_overlapped *overlapped)
+{  return 0 != UnlockFileEx(hnd, 0, size_low, size_high, overlapped);  }
 
 inline bool write_file(void *hnd, const void *buffer, unsigned long bytes_to_write, unsigned long *bytes_written, interprocess_overlapped* overlapped)
 {  return 0 != WriteFile(hnd, buffer, bytes_to_write, bytes_written, overlapped);  }

From 6586572759086e4a0ca049334cb6187129c01380 Mon Sep 17 00:00:00 2001
From: oktonion <0oktonion0@gmail.com>
Date: Mon, 2 Mar 2020 11:17:27 +0300
Subject: [PATCH 3/3] enhancing of win file locks

makes returns clear to understand
elimintes compiler warnings
---
 include/boost/interprocess/detail/os_file_functions.hpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/boost/interprocess/detail/os_file_functions.hpp b/include/boost/interprocess/detail/os_file_functions.hpp
index 198392a..2cf56dd 100644
--- a/include/boost/interprocess/detail/os_file_functions.hpp
+++ b/include/boost/interprocess/detail/os_file_functions.hpp
@@ -239,7 +239,8 @@ inline bool try_acquire_file_lock(file_handle_t hnd, bool &acquired)
                acquired = false, true : false;
 
    }
-   return (true == acquired);
+   acquired = true;
+   return true;
 }
 
 inline bool release_file_lock(file_handle_t hnd)
@@ -268,7 +269,9 @@ inline bool try_acquire_file_lock_sharable(file_handle_t hnd, bool &acquired)
       return winapi::get_last_error() == winapi::error_lock_violation ?
                acquired = false, true : false;
    }
-   return (true == acquired);
+   
+   acquired = true;
+   return true;
 }
 
 inline bool release_file_lock_sharable(file_handle_t hnd)