Temporarily added partial posix libraris from Odin because posix support for Linux isn't done in Odin yet

2024-10-27 20:23:14 -07:00
parent dad9772659
commit 5400ef419a
4 changed files with 211 additions and 28 deletions
--- a/posix/poll.odin
+++ b/posix/poll.odin
@ -0,0 +1,98 @@
+package posix
+
+import "base:intrinsics"
+
+import "core:c"
+
+when ODIN_OS == .Darwin {
+	foreign import lib "system:System.framework"
+} else {
+	foreign import lib "system:c"
+}
+
+// poll.h - definitions for the poll() function
+
+foreign lib {
+	/*
+	For each pointer in fds, poll() shall examine the given descriptor for the events.
+	poll will identify on which descriptors writes or reads can be done.
+
+	Returns: -1 (setting errno) on failure, 0 on timeout, the amount of fds that have been changed on success.
+
+	[[ More; https://pubs.opengroup.org/onlinepubs/9699919799/functions/poll.html ]]
+	*/
+	poll :: proc(fds: [^]pollfd, nfds: nfds_t, timeout: c.int) -> c.int ---
+}
+
+nfds_t :: c.uint
+
+Poll_Event_Bits :: enum c.short {
+	// Data other than high-priority data may be read without blocking.
+	IN     = log2(POLLIN),
+	// Normal data may be read without blocking.
+	RDNORM = log2(POLLRDNORM),
+	// Priority data may be read without blocking.
+	RDBAND = log2(POLLRDBAND),
+	// High priority data may be read without blocking.
+	PRI    = log2(POLLPRI),
+
+	// Normal data may be written without blocking.
+	OUT    = log2(POLLOUT),
+	// Equivalent to POLLOUT.
+	WRNORM = log2(POLLWRNORM),
+	// Priority data may be written.
+	WRBAND = log2(POLLWRBAND),
+
+	// An error has occurred (revents only).
+	ERR  = log2(POLLERR),
+	// Device hsa been disconnected (revents only).
+	HUP  = log2(POLLHUP),
+	// Invalid fd member (revents only).
+	NVAL = log2(POLLNVAL),
+}
+Poll_Event :: bit_set[Poll_Event_Bits; c.short]
+
+when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS == .OpenBSD {
+
+	pollfd :: struct {
+		fd:      FD,         /* [PSX] the following descriptor being polled */
+		events:  Poll_Event, /* [PSX] the input event flags */
+		revents: Poll_Event, /* [PSX] the output event flags */
+	}
+
+	POLLIN     :: 0x0001
+	POLLRDNORM :: 0x0040
+	POLLRDBAND :: 0x0080
+	POLLPRI    :: 0x0002
+	POLLOUT    :: 0x0004
+	POLLWRNORM :: POLLOUT
+	POLLWRBAND :: 0x0100
+
+	POLLERR    :: 0x0008
+	POLLHUP    :: 0x0010
+	POLLNVAL   :: 0x0020
+
+} else when ODIN_OS == .Linux {
+
+	pollfd :: struct {
+		fd:      FD,         /* [PSX] the following descriptor being polled */
+		events:  Poll_Event, /* [PSX] the input event flags */
+		revents: Poll_Event, /* [PSX] the output event flags */
+	}
+
+	POLLIN     :: 0x0001
+	POLLRDNORM :: 0x0040
+	POLLRDBAND :: 0x0080
+	POLLPRI    :: 0x0002
+	POLLOUT    :: 0x0004
+	POLLWRNORM :: 0x0100
+	POLLWRBAND :: 0x0200
+
+	POLLERR    :: 0x0008
+	POLLHUP    :: 0x0010
+	POLLNVAL   :: 0x0020
+
+} else {
+	#panic("posix is unimplemented for the current target")
+}
+