- /* This switch select a case base on a static value: the compiler optimizes it out */
- /* It could be replaced by a set of #ifdef/#else/#endif blocks */
- switch(sizeof(uintptr_t) / sizeof(int)) {
- case 1:
- makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
- 2, 1, (int)ctx_addr);
- break;
- case 2:
- makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
- 3, 2, (int)(ctx_addr >> (8 * sizeof(int))), (int)(ctx_addr));
- break;
- default:
- THROW_IMPOSSIBLE;
- }
+ makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
+ SIZEOF_VOIDP / SIZEOF_INT + 1, SIZEOF_VOIDP / SIZEOF_INT,
+#if (SIZEOF_VOIDP == SIZEOF_INT)
+ (int)ctx_addr
+#elif (SIZEOF_VOIDP == 2 * SIZEOF_INT)
+ (int)(ctx_addr >> (8 * sizeof(int))),
+ (int)(ctx_addr)
+#else
+#error Your architecture is not supported yet
+#endif
+ );