5 files changed, 10 insertions, 18 deletions
diff --git a/src/alloc/alloc_mmap/mmap_mem.h b/src/alloc/alloc_mmap/mmap_mem.h
index da3dda31d..14caf5db1 100644
--- a/src/alloc/alloc_mmap/mmap_mem.h
+++ b/src/alloc/alloc_mmap/mmap_mem.h
@@ -18,7 +18,6 @@ namespace Botan {
 class MemoryMapping_Allocator : public Pooling_Allocator
    {
    public:
-      MemoryMapping_Allocator(Mutex* m) : Pooling_Allocator(m) {}
       std::string type() const { return "mmap"; }
    private:
       void* alloc_block(u32bit);
diff --git a/src/alloc/mem_pool/info.txt b/src/alloc/mem_pool/info.txt
index 5097c325f..f87ea4c4c 100644
--- a/src/alloc/mem_pool/info.txt
+++ b/src/alloc/mem_pool/info.txt
@@ -6,7 +6,3 @@ mem_pool.cpp
 <header:internal>
 mem_pool.h
 </header:internal>
-
-<requires>
-mutex
-</requires>
diff --git a/src/alloc/mem_pool/mem_pool.cpp b/src/alloc/mem_pool/mem_pool.cpp
index 4180d2602..ba82fefdc 100644
--- a/src/alloc/mem_pool/mem_pool.cpp
+++ b/src/alloc/mem_pool/mem_pool.cpp
@@ -96,7 +96,7 @@ void Pooling_Allocator::Memory_Block::free(void* ptr, u32bit blocks)
 /*
 * Pooling_Allocator Constructor
 */
-Pooling_Allocator::Pooling_Allocator(Mutex* m) : mutex(m)
+Pooling_Allocator::Pooling_Allocator()
    {
    last_used = blocks.begin();
    }
@@ -106,7 +106,6 @@ Pooling_Allocator::Pooling_Allocator(Mutex* m) : mutex(m)
 */
 Pooling_Allocator::~Pooling_Allocator()
    {
-   delete mutex;
    if(blocks.size())
       throw Invalid_State("Pooling_Allocator: Never released memory");
    }
@@ -116,7 +115,7 @@ Pooling_Allocator::~Pooling_Allocator()
 */
 void Pooling_Allocator::destroy()
    {
-   Mutex_Holder lock(mutex);
+   std::lock_guard<std::mutex> lock(mutex);
 
    blocks.clear();
 
@@ -133,7 +132,7 @@ void* Pooling_Allocator::allocate(u32bit n)
    const u32bit BITMAP_SIZE = Memory_Block::bitmap_size();
    const u32bit BLOCK_SIZE = Memory_Block::block_size();
 
-   Mutex_Holder lock(mutex);
+   std::lock_guard<std::mutex> lock(mutex);
 
    if(n <= BITMAP_SIZE * BLOCK_SIZE)
       {
@@ -170,7 +169,7 @@ void Pooling_Allocator::deallocate(void* ptr, u32bit n)
    if(ptr == 0 && n == 0)
       return;
 
-   Mutex_Holder lock(mutex);
+   std::lock_guard<std::mutex> lock(mutex);
 
    if(n > BITMAP_SIZE * BLOCK_SIZE)
       dealloc_block(ptr, n);
@@ -178,8 +177,8 @@ void Pooling_Allocator::deallocate(void* ptr, u32bit n)
       {
       const u32bit block_no = round_up(n, BLOCK_SIZE) / BLOCK_SIZE;
 
-      std::vector<Memory_Block>::iterator i =
-         std::lower_bound(blocks.begin(), blocks.end(), Memory_Block(ptr));
+      auto i = std::lower_bound(blocks.begin(), blocks.end(),
+                                Memory_Block(ptr));
 
       if(i == blocks.end() || !i->contains(ptr, block_no))
          throw Invalid_State("Pointer released to the wrong allocator");
@@ -196,7 +195,7 @@ byte* Pooling_Allocator::allocate_blocks(u32bit n)
    if(blocks.empty())
       return 0;
 
-   std::vector<Memory_Block>::iterator i = last_used;
+   auto i = last_used;
 
    do
       {
diff --git a/src/alloc/mem_pool/mem_pool.h b/src/alloc/mem_pool/mem_pool.h
index 9735a547d..f0a564965 100644
--- a/src/alloc/mem_pool/mem_pool.h
+++ b/src/alloc/mem_pool/mem_pool.h
@@ -10,7 +10,7 @@
 
 #include <botan/allocate.h>
 #include <botan/exceptn.h>
-#include <botan/internal/mutex.h>
+#include <mutex>
 #include <utility>
 #include <vector>
 
@@ -27,7 +27,7 @@ class Pooling_Allocator : public Allocator
 
       void destroy();
 
-      Pooling_Allocator(Mutex*);
+      Pooling_Allocator();
       ~Pooling_Allocator();
    private:
       void get_more_core(u32bit);
@@ -66,7 +66,7 @@ class Pooling_Allocator : public Allocator
       std::vector<Memory_Block> blocks;
       std::vector<Memory_Block>::iterator last_used;
       std::vector<std::pair<void*, u32bit> > allocated;
-      Mutex* mutex;
+      std::mutex mutex;
    };
 
 }
diff --git a/src/alloc/system_alloc/defalloc.h b/src/alloc/system_alloc/defalloc.h
index 0c8804223..436549540 100644
--- a/src/alloc/system_alloc/defalloc.h
+++ b/src/alloc/system_alloc/defalloc.h
@@ -30,8 +30,6 @@ class Malloc_Allocator : public Allocator
 class Locking_Allocator : public Pooling_Allocator
    {
    public:
-      Locking_Allocator(Mutex* m) : Pooling_Allocator(m) {}
-
       std::string type() const { return "locking"; }
    private:
       void* alloc_block(u32bit);