diff --git a/c/malloc_speed_test/pool1.c b/c/malloc_speed_test/pool1.c
new file mode 100644
index 0000000..2e4ecba
--- /dev/null
+++ b/c/malloc_speed_test/pool1.c
@@ -0,0 +1,64 @@
+#include <stdlib.h>
+
+#define MAX_I 0x00ffffff
+
+#define bool char
+#define TRUE 1
+#define FALSE 0
+
+struct object_s {
+    char val;
+};
+
+struct block_s {
+    bool busy;
+    struct object_s obj;
+};
+
+struct block_s pool[MAX_I];
+
+void init()
+{
+    size_t i;
+
+    for (i = 0; i < MAX_I; i++)
+	pool[i].busy = TRUE;
+}
+
+#define MAX_B (pool + MAX_I * sizeof(struct block_s))
+
+inline void *alloc()
+{
+    static struct block_s *b = pool;
+    struct block_s *old_b = b;
+
+    for ( ; b < MAX_B; b++)
+	if (!b->busy) {
+	    b->busy = TRUE;
+	    return &b->obj;
+	}
+
+    for (b = pool; b < old_b; b++)
+	if (!b->busy) {
+	    b->busy = TRUE;
+	    return &b->obj;
+	}
+
+    return NULL;
+}
+
+inline void free(void *p)
+{
+    bool *b = (bool *)(p - sizeof(bool));
+    *b = FALSE;
+}
+
+int main()
+{
+	unsigned long long i;
+
+	for (i = 0; i < MAX_I; i++)
+	    alloc();
+
+	return 0;
+}
diff --git a/c/malloc_speed_test/run.sh b/c/malloc_speed_test/run.sh
index 1f7b393..788c53b 100755
--- a/c/malloc_speed_test/run.sh
+++ b/c/malloc_speed_test/run.sh
@@ -1,7 +1,10 @@
 #!/bin/bash
 
 echo "malloc_speed_test.c test:"
-cc -O2 malloc_speed_test.c -o malloc_speed_test && time ./malloc_speed_test 
+cc -O2 malloc_speed_test.c -o malloc_speed_test && time ./malloc_speed_test
 
 echo -e "\n\nvector_add.cpp test:"
-c++ -O2 vector_add.cpp -o vector_add && time ./vector_add 
+c++ -O2 vector_add.cpp -o vector_add && time ./vector_add
+
+echo "pool1.c test:"
+cc -O2 pool1.c -o pool1 && time ./pool1
diff --git a/c/malloc_speed_test/vector_add.cpp b/c/malloc_speed_test/vector_add.cpp
index e87affe..d852cbe 100644
--- a/c/malloc_speed_test/vector_add.cpp
+++ b/c/malloc_speed_test/vector_add.cpp
@@ -2,7 +2,7 @@
 
 using namespace std;
 
-const unsigned long long MAX_I = 0x00ffffff;
+const unsigned long long MAX_I = 0x0fffffff;
 
 int main()
 {
diff --git a/c/mstats_ex/mstats_ex.c b/c/mstats_ex/mstats_ex.c
new file mode 100644
index 0000000..8c135d5
--- /dev/null
+++ b/c/mstats_ex/mstats_ex.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <malloc.h>
+
+int main(int argc, char *argv[])
+{
+	struct mstats ms;
+	
+	ms = mstats();
+
+	return EXIT_SUCCESS;
+}
+