reorganize

src/ch03/cond_dynamic.c

@@ -0,0 +1,40 @@
+/*
+ * cond_dynamic.c
+ *
+ * Demonstrate dynamic initialization of a condition variable.
+ */
+#include <pthread.h>
+#include "errors.h"
+
+/*
+ * Define a structure, with a mutex and condition variable.
+ */
+typedef struct my_struct_tag {
+    pthread_mutex_t     mutex;  /* Protects access to value */
+    pthread_cond_t      cond;   /* Signals change to value */
+    int                 value;  /* Access protected by mutex */
+} my_struct_t;
+
+int main (int argc, char *argv[])
+{
+    my_struct_t *data;
+    int status;
+
+    data = malloc (sizeof (my_struct_t));
+    if (data == NULL)
+        errno_abort ("Allocate structure");
+    status = pthread_mutex_init (&data->mutex, NULL);
+    if (status != 0)
+        err_abort (status, "Init mutex");
+    status = pthread_cond_init (&data->cond, NULL);
+    if (status != 0)
+        err_abort (status, "Init condition");
+    status = pthread_cond_destroy (&data->cond);
+    if (status != 0)
+        err_abort (status, "Destroy condition");
+    status = pthread_mutex_destroy (&data->mutex);
+    if (status != 0)
+        err_abort (status, "Destroy mutex");
+    (void)free (data);
+    return status;
+}