Added the OS files

1 files changed, 62 insertions, 0 deletions

diff --git a/ecos/examples/twothreads.c b/ecos/examples/twothreads.c
new file mode 100644
index 0000000..bbc7347
--- /dev/null
+++ b/ecos/examples/twothreads.c
@@ -0,0 +1,62 @@
+#include <cyg/kernel/kapi.h>
+
+#include <stdio.h>
+#include <math.h>
+#include <stdlib.h>
+
+/* now declare (and allocate space for) some kernel objects,
+   like the two threads we will use */
+cyg_thread thread_s[2];		/* space for two thread objects */
+
+char stack[2][4096];		/* space for two 4K stacks */
+
+/* now the handles for the threads */
+cyg_handle_t simple_threadA, simple_threadB;
+
+/* and now variables for the procedure which is the thread */
+cyg_thread_entry_t simple_program;
+
+/* and now a mutex to protect calls to the C library */
+cyg_mutex_t cliblock;
+
+/* we install our own startup routine which sets up threads */
+void cyg_user_start(void)
+{
+  printf("Entering twothreads' cyg_user_start() function\n");
+
+  cyg_mutex_init(&cliblock);
+
+  cyg_thread_create(4, simple_program, (cyg_addrword_t) 0,
+		    "Thread A", (void *) stack[0], 4096,
+		    &simple_threadA, &thread_s[0]);
+  cyg_thread_create(4, simple_program, (cyg_addrword_t) 1,
+		    "Thread B", (void *) stack[1], 4096,
+		    &simple_threadB, &thread_s[1]);
+
+  cyg_thread_resume(simple_threadA);
+  cyg_thread_resume(simple_threadB);
+}
+
+/* this is a simple program which runs in a thread */
+void simple_program(cyg_addrword_t data)
+{
+  int message = (int) data;
+  int delay;
+
+  printf("Beginning execution; thread data is %d\n", message);
+
+  cyg_thread_delay(200);
+
+  for (;;) {
+    delay = 200 + (rand() % 50);
+
+    /* note: printf() must be protected by a
+       call to cyg_mutex_lock() */
+    cyg_mutex_lock(&cliblock); {
+      printf("Thread %d: and now a delay of %d clock ticks\n",
+	     message, delay);
+    }
+    cyg_mutex_unlock(&cliblock);
+    cyg_thread_delay(delay);
+  }
+}