From: Sebastian <git@sraa.de>
Date: Thu, 26 Jun 2014 01:43:21 +0000 (+0000)
Subject: add compile-time error for oversized grids
X-Git-Url: http://sraa.de/git/?a=commitdiff_plain;h=ce7aa2f399c9fab364533cfe67e189b90f51ca3a;p=lattice-boltzmann-epiphany.git

add compile-time error for oversized grids
---

diff --git a/lb/Makefile b/lb/Makefile
index 949e1a6..4bb87ae 100644
--- a/lb/Makefile
+++ b/lb/Makefile
@@ -34,6 +34,7 @@ EELFS	= $(EAPPS:$(DEST)%srec=$(EDEST)%elf)
 
 .SECONDARY:
 .PHONY: all help host target folders run clean
+.NOTPARALLEL: clean
 
 # === Phony Rules =========================================================
 help:
@@ -69,15 +70,15 @@ clean:
 		2>/dev/null
 
 $(HDEST):
-	@$(ECHO) "\tMKDIR $(HDEST)"
+	@$(ECHO) "\t(HOST)   MKDIR $(HDEST)"
 	@mkdir -p $(HDEST)
 
 $(EDEST):
-	@$(ECHO) "\tMKDIR $(EDEST)"
+	@$(ECHO) "\t(HOST)   MKDIR $(EDEST)"
 	@mkdir -p $(EDEST)
 
 $(DEST):
-	@$(ECHO) "\tMKDIR $(DEST)"
+	@$(ECHO) "\t(HOST)   MKDIR $(DEST)"
 	@mkdir -p $(DEST)
 
 # === Host Rules ==========================================================
diff --git a/lb/esrc/lb_2d.c b/lb/esrc/lb_2d.c
index 99f6550..6f36cef 100644
--- a/lb/esrc/lb_2d.c
+++ b/lb/esrc/lb_2d.c
@@ -22,6 +22,8 @@ void delay(void)
 
 int main()
 {
+	BUILD_BUG(BLOCK_X * BLOCK_Y * sizeof(d2q9_node_t) > 24*1024);
+
 	const FLOAT omega = 1.0;
 
 	init_block(block);
diff --git a/lb/shared.h b/lb/shared.h
index 44515d9..7000418 100644
--- a/lb/shared.h
+++ b/lb/shared.h
@@ -3,10 +3,15 @@
 #define _SHARED_H_
 
 #include <stdint.h>
+
+/* PACKED is defined for e-gcc, but not for gcc */
 #ifndef PACKED
 #define PACKED __attribute__((packed))
 #endif /* PACKED */
 
+/* produce compile-time errors if condition is true */
+#define BUILD_BUG(c) do { ((void)sizeof(char[1 - 2*!!(c)])); } while(0);
+
 /* number of cores */
 #define NUM_CORES 16