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-rw-r--r--src/vppinfra/mem.h21
-rw-r--r--src/vppinfra/os.h6
2 files changed, 27 insertions, 0 deletions
diff --git a/src/vppinfra/mem.h b/src/vppinfra/mem.h
index e31ec82e7c5..f2930a11253 100644
--- a/src/vppinfra/mem.h
+++ b/src/vppinfra/mem.h
@@ -60,6 +60,27 @@
/* Per CPU heaps. */
extern void *clib_per_cpu_mheaps[CLIB_MAX_MHEAPS];
+always_inline void
+clib_mem_set_thread_index (void)
+{
+ /*
+ * Find an unused slot in the per-cpu-mheaps array,
+ * and grab it for this thread. We need to be able to
+ * push/pop the thread heap without affecting other thread(s).
+ */
+ int i;
+ if (__os_thread_index != 0)
+ return;
+ for (i = 0; i < ARRAY_LEN (clib_per_cpu_mheaps); i++)
+ if (clib_atomic_bool_cmp_and_swap (&clib_per_cpu_mheaps[i],
+ 0, clib_per_cpu_mheaps[0]))
+ {
+ os_set_thread_index (i);
+ break;
+ }
+ ASSERT (__os_thread_index > 0);
+}
+
always_inline void *
clib_mem_get_per_cpu_heap (void)
{
diff --git a/src/vppinfra/os.h b/src/vppinfra/os.h
index 3ec214e29b1..50a4ad97c93 100644
--- a/src/vppinfra/os.h
+++ b/src/vppinfra/os.h
@@ -64,6 +64,12 @@ os_get_thread_index (void)
return __os_thread_index;
}
+static_always_inline void
+os_set_thread_index (uword thread_index)
+{
+ __os_thread_index = thread_index;
+}
+
static_always_inline uword
os_get_cpu_number (void) __attribute__ ((deprecated));