Merge bitcoin/bitcoin#25320: util: modify Win32LockedPageAllocator to query windows for limit.

1cb42aeda37f4979923cd7e1c85febe994480de6 util: modify Win32LockedPageAllocator to query windows for limit (Oskar Mendel)

Pull request description:

  This PR resolves a todo within the Win32LockedPageAllocator: `// TODO is there a limit on Windows, how to get it?`.
  The idea is to use the Windows API to get the limits like the posix based allocator does with `getrlimit`.

  I use [GetProcessWorkingSetSize](https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-getprocessworkingsetsize) to perform this task and fallback to `return std::numeric_limits<size_t>::max();` just like the posix implementation does.

ACKs for top commit:
  sipsorcery:
    tACK 1cb42aeda37f4979923cd7e1c85febe994480de6.

Tree-SHA512: 7bdd8a57a4e64ee59d752417a519656e03526878462060753be4dce481eff4889fb5edc1bdbd575b707d9b2dfe255c87da9ef67baac97de9ac5e70a04c852081

1 files changed, 4 insertions, 1 deletions

diff --git a/src/support/lockedpool.cpp b/src/support/lockedpool.cpp
index 6907749c6d..b7ef479675 100644
--- a/src/support/lockedpool.cpp
+++ b/src/support/lockedpool.cpp
@@ -202,7 +202,10 @@ void Win32LockedPageAllocator::FreeLocked(void* addr, size_t len)
 
 size_t Win32LockedPageAllocator::GetLimit()
 {
-    // TODO is there a limit on Windows, how to get it?
+    size_t min, max;
+    if(GetProcessWorkingSetSize(GetCurrentProcess(), &min, &max) != 0) {
+        return min;
+    }
     return std::numeric_limits<size_t>::max();
 }
 #endif