Ken Van Hoeylandt
6e5e35610b
Implement file IO for applications to facilitate text input/output capturing. Apps can now launch apps and: - Read their stdio output - Write to their stdio input
46 lines
883 B
C++
46 lines
883 B
C++
// SPDX-License-Identifier: Apache-2.0
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#include <app/private/null_device.h>
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namespace {
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ssize_t null_read(void*, void*, size_t) {
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return 0; // EOF
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}
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ssize_t null_write(void*, const void* buffer, size_t size) {
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(void)buffer;
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return static_cast<ssize_t>(size); // discarded, reported as fully written
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}
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error_t null_close(void*) {
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return ERROR_NONE;
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}
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error_t null_await(void*, AppFileWait, TickType_t) {
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return ERROR_NONE; // always ready
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}
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uint32_t null_poll(void*) {
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return APP_FILE_READABLE | APP_FILE_WRITABLE;
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}
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const AppFileOps NULL_OPS = {
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.read = null_read,
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.write = null_write,
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.close = null_close,
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.await = null_await,
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.poll = null_poll,
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};
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constexpr AppFile NULL_FILE = { .ops = &NULL_OPS, .object = nullptr };
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} // namespace
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extern "C" {
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const AppFile* app_null_file(void) {
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return &NULL_FILE;
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}
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} // extern "C"
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