vppinfra: add clib_mem_destroy_mspace(void *ms)

Also clib_mem_destroy() to destroy the current mspace.

Handy when an application wants to make a memory allocation arena
disappear.

Type: improvement

Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: I020db902fbe2473545506fecbc230c2b048992f8

src/vppinfra/mem.h

@@ -412,6 +412,8 @@ uword clib_mem_get_default_hugepage_size (void);
 int clib_mem_get_fd_log2_page_size (int fd);
 uword clib_mem_vm_reserve (uword start, uword size, u32 log2_page_sz);
 u64 *clib_mem_vm_get_paddr (void *mem, int log2_page_size, int n_pages);
+void clib_mem_destroy_mspace (void *mspace);
+void clib_mem_destroy (void);
 
 typedef struct
 {

src/vppinfra/mem_dlmalloc.c

@@ -237,6 +237,23 @@ clib_mem_init_thread_safe (void *memory, uword memory_size)
 				 1 /* do clib_mem_set_heap */ );
 }
 
+void
+clib_mem_destroy_mspace (void *mspace)
+{
+  mheap_trace_main_t *tm = &mheap_trace_main;
+
+  if (tm->enabled && mspace == tm->current_traced_mheap)
+    tm->enabled = 0;
+
+  destroy_mspace (mspace);
+}
+
+void
+clib_mem_destroy (void)
+{
+  clib_mem_destroy_mspace (clib_mem_get_heap ());
+}
+
 void *
 clib_mem_init_thread_safe_numa (void *memory, uword memory_size, u8 numa)
 {