Alternative implementation or parmap with busy waits instead of futexes

[simgrid.git] / include / xbt / parmap.h

diff --git a/include/xbt/parmap.h b/include/xbt/parmap.h
index 7bf69c0..b2e66dc 100644 (file)
--- a/include/xbt/parmap.h
+++ b/include/xbt/parmap.h
@@ -32,7 +32,17 @@ SG_BEGIN_DECL()
 /** \brief Parallel map data type (opaque type) */
 typedef struct s_xbt_parmap *xbt_parmap_t;
 
 /** \brief Parallel map data type (opaque type) */
 typedef struct s_xbt_parmap *xbt_parmap_t;
 

-XBT_PUBLIC(xbt_parmap_t) xbt_parmap_new(unsigned int num_workers);
+/**
+ * \brief Synchronization mode of the worker threads of a parmap.
+ */
+typedef enum {
+  XBT_PARMAP_POSIX,          /**< use POSIX synchronization primitives */
+  XBT_PARMAP_FUTEX,          /**< use Linux futex system call */
+  XBT_PARMAP_BUSY_WAIT       /**< busy waits (no system calls, maximum CPU usage) */
+} e_xbt_parmap_mode_t;
+
+XBT_PUBLIC(xbt_parmap_t) xbt_parmap_new(unsigned int num_workers,
+    e_xbt_parmap_mode_t mode);

 XBT_PUBLIC(void) xbt_parmap_destroy(xbt_parmap_t parmap);
 
 XBT_PUBLIC(void) xbt_parmap_apply(xbt_parmap_t parmap,
 XBT_PUBLIC(void) xbt_parmap_destroy(xbt_parmap_t parmap);
 
 XBT_PUBLIC(void) xbt_parmap_apply(xbt_parmap_t parmap,