Setup aio skeleton

7 files changed, 147 insertions, 1 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 7420122..0f28e58 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -21,6 +21,7 @@ target_link_libraries(${PROJECT_NAME} PRIVATE nanowasm)
 set(cflags ${cflags} -Wall -ffunction-sections -fdata-sections -pedantic)
 
 set(components
+    aio
 )
 
 set(interfaces
diff --git a/src/aio/CMakeLists.txt b/src/aio/CMakeLists.txt
new file mode 100644
index 0000000..3f4561a
--- /dev/null
+++ b/src/aio/CMakeLists.txt
@@ -0,0 +1,6 @@
+set(src
+    "src/close.c"
+    "src/open.c"
+)
+add_library(aio ${src})
+target_include_directories(aio PUBLIC "include" PRIVATE "private_include")
diff --git a/src/aio/include/aio.h b/src/aio/include/aio.h
new file mode 100644
index 0000000..f9f76cb
--- /dev/null
+++ b/src/aio/include/aio.h
@@ -0,0 +1,35 @@
+/*
+ * wanix, a Unix-like operating system for WebAssembly
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef AIO_H
+#define AIO_H
+
+#include <stddef.h>
+
+enum
+{
+    AIO_POLLIN = 1,
+    AIO_POLLOUT = 1 << 1
+};
+
+struct aio *aio_open(const char *path, const char *mode);
+int aio_poll(struct aio **io, size_t n);
+int aio_event(const struct aio *io, int ev);
+int aio_close(struct aio *io);
+
+#endif
diff --git a/src/aio/private_include/aio/types.h b/src/aio/private_include/aio/types.h
new file mode 100644
index 0000000..31ee414
--- /dev/null
+++ b/src/aio/private_include/aio/types.h
@@ -0,0 +1,16 @@
+#ifndef AIO_PRV_OPEN_H
+#define AIO_PRV_OPEN_H
+
+enum aio_state
+{
+    AIO_OK,
+    AIO_AGAIN,
+    AIO_FATAL
+};
+
+struct aio
+{
+    enum aio_state (*next)(struct aio *);
+};
+
+#endif
diff --git a/src/aio/src/close.c b/src/aio/src/close.c
new file mode 100644
index 0000000..a6067a8
--- /dev/null
+++ b/src/aio/src/close.c
@@ -0,0 +1,34 @@
+/*
+ * wanix, a Unix-like operating system for WebAssembly
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <aio.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int aio_close(struct aio *const aio)
+{
+    if (!aio)
+    {
+        errno = EINVAL;
+        return EOF;
+    }
+
+    free(aio);
+    return 0;
+}
diff --git a/src/aio/src/open.c b/src/aio/src/open.c
new file mode 100644
index 0000000..89fbbba
--- /dev/null
+++ b/src/aio/src/open.c
@@ -0,0 +1,33 @@
+/*
+ * wanix, a Unix-like operating system for WebAssembly
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <aio/types.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+struct aio *aio_open(const char *const path, const char *const mode)
+{
+    struct aio *const ret = malloc(sizeof *ret);
+
+    if (!ret)
+        goto failure;
+
+failure:
+    free(ret);
+    return NULL;
+}
diff --git a/src/main.c b/src/main.c
index 09c1f21..99d4c95 100644
--- a/src/main.c
+++ b/src/main.c
@@ -16,10 +16,31 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+#include <aio.h>
+#include <errno.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 int main(void)
 {
-    int ret = EXIT_SUCCESS;
+    int ret = EXIT_FAILURE;
+    struct aio *aio = aio_open("/media/cdrom/", "rb");
+
+    if (!aio)
+    {
+        fprintf(stderr, "%s: aio_open failed: %s\n", __func__, strerror(errno));
+        goto end;
+    }
+
+    ret = EXIT_SUCCESS;
+
+end:
+    if (aio && aio_close(aio))
+    {
+        fprintf(stderr, "%s: aio_close failed: %s\n", __func__, strerror(errno));
+        ret = EXIT_FAILURE;
+    }
+
     return ret;
 }