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path: root/src/evalvars.c
AgeCommit message (Expand)Author
2024-04-24patch 9.1.0369: Vim9: problem when importing autoloaded scriptsv9.1.0369Ernie Rael
2024-04-21patch 9.1.0360: Vim9: does not handle autoloaded variables wellv9.1.0360Ernie Rael
2024-04-15patch 9.1.0335: String interpolation fails for List typev9.1.0335Yegappan Lakshmanan
2024-04-13patch 9.1.0313: Crash when using heredoc with comment in command blockv9.1.0313zeertzjq
2024-04-12patch 9.1.0312: heredocs are not supported for :commandsv9.1.0312Yegappan Lakshmanan
2024-03-28patch 9.1.0219: Vim9: No enum supportv9.1.0219Yegappan Lakshmanan
2024-03-09patch 9.1.0160: Vim9: Add support for using a class type of itself in an obje...v9.1.0160Yegappan Lakshmanan
2024-02-12patch 9.1.0102: settabvar() may change the last accessed tabpagev9.1.0102zeertzjq
2024-02-06patch 9.1.0080: unexpected error for modifying final list using +=v9.1.0080Yegappan Lakshmanan
2024-01-16patch 9.1.0034: Window scrolls unexpectedly when 'scrollbind' is setv9.1.0034Christian Brabandt
2024-01-04patch 9.1.0006: is*() and to*() function may be unsafev9.1.0006Keith Thompson
2023-12-21patch 9.0.2184: Vim9: inconsistent :type/:class messagesv9.0.2184Ernie Rael
2023-12-19patch 9.0.2180: POSIX function name in exarg causes issuesv9.0.2180Zoltan Arpadffy
2023-12-18patch 9.0.2174: Vim9: segfault when assigning to typev9.0.2174Ernie Rael
2023-12-11patch 9.0.2156: Vim9: can use typealias in assignmentv9.0.2156Ernie Rael
2023-10-28patch 9.0.2078: several problems with type aliasesv9.0.2078Yegappan Lakshmanan
2023-10-27patch 9.0.2076: Vim9: No support for type aliasesv9.0.2076Yegappan Lakshmanan
2023-10-05patch 9.0.1986: Vim9: accepting type-annotationsv9.0.1986Yegappan Lakshmanan
2023-10-04patch 9.0.1982: vim9: clean up from v9.0.1955v9.0.1982Ernie Rael
2023-09-29patch 9.0.1955: Vim9: lockvar issues with objects/classesv9.0.1955Ernie Rael
2023-09-24patch 9.0.1933: Can change the type of a v: variable using if_luav9.0.1933zeertzjq
2023-08-20patch 9.0.1776: No support for stable Python 3 ABIv9.0.1776Yee Cheng Chin
2023-08-19patch 9.0.1741: No type checking in interfacesv9.0.1741LemonBoy
2023-06-14patch 9.0.1631: passing wrong variable type to option gives multiple errorsv9.0.1631zeertzjq
2023-06-05patch 9.0.1611: v:maxcol can be changed in a :for loopv9.0.1611Bram Moolenaar
2023-05-24patch 9.0.1576: users may not know what to do with an internal errorv9.0.1576Bram Moolenaar
2023-04-12patch 9.0.1447: condition is always truev9.0.1447zeertzjq
2023-03-07patch 9.0.1390: FOR_ALL_ macros are defined in an unexpected filev9.0.1390Yegappan Lakshmanan
2023-02-01patch 9.0.1271: using sizeof() and subtract array size is trickyv9.0.1271zeertzjq
2023-01-30patch 9.0.1266: error for space before ": type" is inconsistentv9.0.1266Bram Moolenaar
2023-01-12patch 9.0.1188: return value of type() for class and object unclearv9.0.1188Bram Moolenaar
2023-01-12patch 9.0.1186: imported class does not work when used twice in a linev9.0.1186Bram Moolenaar
2023-01-12patch 9.0.1185: using class from imported script not testedv9.0.1185Bram Moolenaar
2023-01-06patch 9.0.1152: class "implements" argument not implementedv9.0.1152Bram Moolenaar
2023-01-03patch 9.0.1137: some conditions are always falsev9.0.1137zeertzjq
2023-01-02patch 9.0.1133: error message names do not match the itemsv9.0.1133Bram Moolenaar
2023-01-02patch 9.0.1132: code is indented more than neededv9.0.1132Yegappan Lakshmanan
2022-12-08patch 9.0.1031: Vim9 class is not implemented yetv9.0.1031Bram Moolenaar
2022-12-02patch 9.0.0990: callback name argument is changed by setqflist()v9.0.0990Bram Moolenaar
2022-11-28patch 9.0.0965: using one window for executing autocommands is insufficientv9.0.0965Bram Moolenaar
2022-11-25patch 9.0.0949: crash when unletting a variable while listing variablesv9.0.0949Bram Moolenaar
2022-11-16patch 9.0.0890: no test for what patch 9.0.0827 fixesv9.0.0890Bram Moolenaar
2022-10-13patch 9.0.0744: in script in autoload dir exported variable is not foundv9.0.0744Bram Moolenaar
2022-10-12patch 9.0.0732: no check for white space before and after "=<<"v9.0.0732Bram Moolenaar
2022-10-01patch 9.0.0634: evaluating "expr" options has more overhead than neededv9.0.0634Bram Moolenaar
2022-09-21patch 9.0.0535: closure gets wrong value in for loop with two loop variablesv9.0.0535Bram Moolenaar
2022-09-14patch 9.0.0460: loop variable can't be foundv9.0.0460Bram Moolenaar
2022-09-11patch 9.0.0444: trying to declare g:variable gives confusing errorv9.0.0444Bram Moolenaar
2022-09-06patch 9.0.0398: members of funccall_T are inconsistently namedv9.0.0398Bram Moolenaar
2022-09-03patch 9.0.0364: clang static analyzer gives warningsv9.0.0364Yegappan Lakshmanan
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 22:35:38 +0000
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/*
 *  linux/fs/pipe.c
 *
 *  Copyright (C) 1991, 1992, 1999  Linus Torvalds
 */

#include <linux/mm.h>
#include <linux/file.h>
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/log2.h>
#include <linux/mount.h>
#include <linux/magic.h>
#include <linux/pipe_fs_i.h>
#include <linux/uio.h>
#include <linux/highmem.h>
#include <linux/pagemap.h>
#include <linux/audit.h>
#include <linux/syscalls.h>
#include <linux/fcntl.h>
#include <linux/aio.h>

#include <asm/uaccess.h>
#include <asm/ioctls.h>

#include "internal.h"

/*
 * The max size that a non-root user is allowed to grow the pipe. Can
 * be set by root in /proc/sys/fs/pipe-max-size
 */
unsigned int pipe_max_size = 1048576;

/*
 * Minimum pipe size, as required by POSIX
 */
unsigned int pipe_min_size = PAGE_SIZE;

/*
 * We use a start+len construction, which provides full use of the 
 * allocated memory.
 * -- Florian Coosmann (FGC)
 * 
 * Reads with count = 0 should always return 0.
 * -- Julian Bradfield 1999-06-07.
 *
 * FIFOs and Pipes now generate SIGIO for both readers and writers.
 * -- Jeremy Elson <jelson@circlemud.org> 2001-08-16
 *
 * pipe_read & write cleanup
 * -- Manfred Spraul <manfred@colorfullife.com> 2002-05-09
 */

static void pipe_lock_nested(struct pipe_inode_info *pipe, int subclass)
{
	if (pipe->files)
		mutex_lock_nested(&pipe->mutex, subclass);
}

void pipe_lock(struct pipe_inode_info *pipe)
{
	/*
	 * pipe_lock() nests non-pipe inode locks (for writing to a file)
	 */
	pipe_lock_nested(pipe, I_MUTEX_PARENT);
}
EXPORT_SYMBOL(pipe_lock);

void pipe_unlock(struct pipe_inode_info *pipe)
{
	if (pipe->files)
		mutex_unlock(&pipe->mutex);
}
EXPORT_SYMBOL(pipe_unlock);

static inline void __pipe_lock(struct pipe_inode_info *pipe)
{
	mutex_lock_nested(&pipe->mutex, I_MUTEX_PARENT);
}

static inline void __pipe_unlock(struct pipe_inode_info *pipe)
{
	mutex_unlock(&pipe->mutex);
}

void pipe_double_lock(struct pipe_inode_info *pipe1,
		      struct pipe_inode_info *pipe2)
{
	BUG_ON(pipe1 == pipe2);

	if (pipe1 < pipe2) {
		pipe_lock_nested(pipe1, I_MUTEX_PARENT);
		pipe_lock_nested(pipe2, I_MUTEX_CHILD);
	} else {
		pipe_lock_nested(pipe2, I_MUTEX_PARENT);
		pipe_lock_nested(pipe1, I_MUTEX_CHILD);
	}
}

/* Drop the inode semaphore and wait for a pipe event, atomically */
void pipe_wait(struct pipe_inode_info *pipe)
{
	DEFINE_WAIT(wait);

	/*
	 * Pipes are system-local resources, so sleeping on them
	 * is considered a noninteractive wait:
	 */
	prepare_to_wait(&pipe->wait, &wait, TASK_INTERRUPTIBLE);
	pipe_unlock(pipe);
	schedule();
	finish_wait(&pipe->wait, &wait);
	pipe_lock(pipe);
}

static void anon_pipe_buf_release(struct pipe_inode_info *pipe,
				  struct pipe_buffer *buf)
{
	struct page *page = buf->page;

	/*
	 * If nobody else uses this page, and we don't already have a
	 * temporary page, let's keep track of it as a one-deep
	 * allocation cache. (Otherwise just release our reference to it)
	 */
	if (page_count(page) == 1 && !pipe->tmp_page)
		pipe->tmp_page = page;
	else
		page_cache_release(page);
}

/**
 * generic_pipe_buf_steal - attempt to take ownership of a &pipe_buffer
 * @pipe:	the pipe that the buffer belongs to
 * @buf:	the buffer to attempt to steal
 *
 * Description:
 *	This function attempts to steal the &struct page attached to
 *	@buf. If successful, this function returns 0 and returns with
 *	the page locked. The caller may then reuse the page for whatever
 *	he wishes; the typical use is insertion into a different file
 *	page cache.
 */
int generic_pipe_buf_steal(struct pipe_inode_info *pipe,
			   struct pipe_buffer *buf)
{
	struct page *page = buf->page;

	/*
	 * A reference of one is golden, that means that the owner of this
	 * page is the only one holding a reference to it. lock the page
	 * and return OK.
	 */
	if (page_count(page) == 1) {
		lock_page(page);
		return 0;
	}

	return 1;
}
EXPORT_SYMBOL(generic_pipe_buf_steal);

/**
 * generic_pipe_buf_get - get a reference to a &struct pipe_buffer
 * @pipe:	the pipe that the buffer belongs to
 * @buf:	the buffer to get a reference to
 *
 * Description:
 *	This function grabs an extra reference to @buf. It's used in
 *	in the tee() system call, when we duplicate the buffers in one
 *	pipe into another.
 */
void generic_pipe_buf_get(struct pipe_inode_info *pipe, struc