initial commit

libs/newlib/platform_include/sys/poll.h

@@ -0,0 +1,40 @@
+/*
+ * SPDX-FileCopyrightText: 2018-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef _ESP_PLATFORM_SYS_POLL_H_
+#define _ESP_PLATFORM_SYS_POLL_H_
+
+#define POLLIN      (1u << 0)      /* data other than high-priority may be read without blocking */
+#define POLLRDNORM  (1u << 1)      /* normal data may be read without blocking */
+#define POLLRDBAND  (1u << 2)      /* priority data may be read without blocking */
+#define POLLPRI     (POLLRDBAND)   /* high-priority data may be read without blocking */
+// Note: POLLPRI is made equivalent to POLLRDBAND in order to fit all these events into one byte
+#define POLLOUT     (1u << 3)      /* normal data may be written without blocking */
+#define POLLWRNORM  (POLLOUT)      /* equivalent to POLLOUT */
+#define POLLWRBAND  (1u << 4)      /* priority data my be written */
+#define POLLERR     (1u << 5)      /* some poll error occurred */
+#define POLLHUP     (1u << 6)      /* file descriptor was "hung up" */
+#define POLLNVAL    (1u << 7)      /* the specified file descriptor is invalid */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct pollfd {
+    int fd;        /* The descriptor. */
+    short events;  /* The event(s) is/are specified here. */
+    short revents; /* Events found are returned here. */
+};
+
+typedef unsigned int nfds_t;
+
+int poll(struct pollfd *fds, nfds_t nfds, int timeout);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _ESP_PLATFORM_SYS_POLL_H_