- asset loader (needed for android)

[andemo] / src / android / logger.c

diff --git a/src/android/logger.c b/src/android/logger.c
new file mode 100644 (file)
index 0000000..8f6ddeb
--- /dev/null
+++ b/src/android/logger.c
@@ -0,0 +1,64 @@
+#include <stdio.h>
+#include <assert.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <android/log.h>
+#include "logger.h"
+
+#ifndef APP_NAME
+#define APP_NAME       "xmas_inferno"
+#endif
+
+static void *thread_func(void *arg);
+
+static int pfd[2];
+static pthread_t thr;
+static int initialized;
+
+int start_logger(void)
+{
+       if(initialized) {
+               return 1;
+       }
+
+       /* set stdout to line-buffered, and stderr to unbuffered */
+       setvbuf(stdout, 0, _IOLBF, 0);
+       setvbuf(stderr, 0, _IONBF, 0);
+
+       if(pipe(pfd) == -1) {
+               perror("failed to create logging pipe");
+               return -1;
+       }
+       assert(pfd[0] > 2 && pfd[1] > 2);
+
+       /* redirect stdout & stderr to the write-end of the pipe */
+       dup2(pfd[1], 1);
+       dup2(pfd[1], 2);
+
+       /* start the logging thread */
+       if(pthread_create(&thr, 0, thread_func, 0) == -1) {
+               perror("failed to spawn logging thread");
+               return -1;
+       }
+       pthread_detach(thr);
+       return 0;
+}
+
+static void *thread_func(void *arg)
+{
+       ssize_t rdsz;
+       char buf[257];
+
+       __android_log_print(ANDROID_LOG_DEBUG, APP_NAME, "logger starting up...");
+
+       while((rdsz = read(pfd[0], buf, sizeof buf - 1)) > 0) {
+               if(buf[rdsz - 1] == '\n') {
+                       --rdsz;
+               }
+               buf[rdsz] = 0;
+               __android_log_write(ANDROID_LOG_DEBUG, APP_NAME, buf);
+       }
+
+       __android_log_print(ANDROID_LOG_DEBUG, APP_NAME, "logger shutting down...");
+       return 0;
+}