749 lines
20 KiB
C
749 lines
20 KiB
C
#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <math.h>
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#ifdef HAVE_ISFINITE
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# define ECORE_FINITE(t) isfinite(t)
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#else
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# ifdef _MSC_VER
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# define ECORE_FINITE(t) _finite(t)
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# else
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# define ECORE_FINITE(t) finite(t)
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# endif
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#endif
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#define FIX_HZ 1
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#ifdef FIX_HZ
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# ifndef _MSC_VER
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# include <sys/param.h>
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# endif
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# ifndef HZ
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# define HZ 100
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# endif
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#endif
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#ifdef HAVE_EVIL
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# include <Evil.h>
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#endif
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#ifdef HAVE_ESCAPE
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# include <Escape.h>
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#endif
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#ifdef HAVE_EXOTIC
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# include <Exotic.h>
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#endif
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/*
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* On Windows, pipe() is implemented with sockets.
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* Contrary to Linux, Windows uses different functions
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* for sockets and fd's: write() is for fd's and send
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* is for sockets. So I need to put some win32 code
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* here. I can't think of a solution where the win32
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* code is in Evil and not here.
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*/
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#ifdef _WIN32
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# include <winsock2.h>
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# define pipe_write(fd, buffer, size) send((fd), (char *)(buffer), size, 0)
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# define pipe_read(fd, buffer, size) recv((fd), (char *)(buffer), size, 0)
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# define pipe_close(fd) closesocket(fd)
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# define PIPE_FD_INVALID INVALID_SOCKET
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# define PIPE_FD_ERROR SOCKET_ERROR
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#else
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# include <unistd.h>
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# include <fcntl.h>
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# define pipe_write(fd, buffer, size) write((fd), buffer, size)
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# define pipe_read(fd, buffer, size) read((fd), buffer, size)
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# define pipe_close(fd) close(fd)
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# define PIPE_FD_INVALID -1
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# define PIPE_FD_ERROR -1
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#endif /* ! _WIN32 */
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#include "Ecore.h"
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#include "ecore_private.h"
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/* How of then we should retry to write to the pipe */
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#define ECORE_PIPE_WRITE_RETRY 6
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struct _Ecore_Pipe
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{
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ECORE_MAGIC;
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int fd_read;
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int fd_write;
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Ecore_Fd_Handler *fd_handler;
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const void *data;
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Ecore_Pipe_Cb handler;
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unsigned int len;
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int handling;
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size_t already_read;
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void *passed_data;
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int message;
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Eina_Bool delete_me : 1;
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};
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GENERIC_ALLOC_SIZE_DECLARE(Ecore_Pipe);
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static Eina_Bool _ecore_pipe_read(void *data,
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Ecore_Fd_Handler *fd_handler);
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/**
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* @addtogroup Ecore_Pipe_Group
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*
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* @{
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*/
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/**
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* Create two file descriptors (sockets on Windows). Add
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* a callback that will be called when the file descriptor that
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* is listened receives data. An event is also put in the event
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* queue when data is received.
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*
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* @param handler The handler called when data is received.
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* @param data Data to pass to @p handler when it is called.
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* @return A newly created Ecore_Pipe object if successful.
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* @c NULL otherwise.
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*/
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EAPI Ecore_Pipe *
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ecore_pipe_add(Ecore_Pipe_Cb handler,
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const void *data)
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{
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Ecore_Pipe *p;
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_ecore_lock();
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p = _ecore_pipe_add(handler, data);
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_ecore_unlock();
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return p;
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}
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/**
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* Free an Ecore_Pipe object created with ecore_pipe_add().
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*
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* @param p The Ecore_Pipe object to be freed.
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* @return The pointer to the private data
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*/
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EAPI void *
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ecore_pipe_del(Ecore_Pipe *p)
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{
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void *r;
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EINA_MAIN_LOOP_CHECK_RETURN_VAL(NULL);
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_ecore_lock();
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r = _ecore_pipe_del(p);
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_ecore_unlock();
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return r;
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}
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/**
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* Close the read end of an Ecore_Pipe object created with ecore_pipe_add().
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*
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* @param p The Ecore_Pipe object.
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*/
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EAPI void
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ecore_pipe_read_close(Ecore_Pipe *p)
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{
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EINA_MAIN_LOOP_CHECK_RETURN;
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_ecore_lock();
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if (!ECORE_MAGIC_CHECK(p, ECORE_MAGIC_PIPE))
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{
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ECORE_MAGIC_FAIL(p, ECORE_MAGIC_PIPE, "ecore_pipe_read_close");
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goto out;
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}
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if (p->fd_handler)
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{
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_ecore_main_fd_handler_del(p->fd_handler);
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p->fd_handler = NULL;
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}
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if (p->fd_read != PIPE_FD_INVALID)
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{
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pipe_close(p->fd_read);
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p->fd_read = PIPE_FD_INVALID;
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}
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out:
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_ecore_unlock();
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}
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/**
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* Stop monitoring if necessary the pipe for reading. See ecore_pipe_thaw()
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* for monitoring it again.
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*
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* @param p The Ecore_Pipe object.
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* @since 1.1
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*/
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EAPI void
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ecore_pipe_freeze(Ecore_Pipe *p)
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{
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EINA_MAIN_LOOP_CHECK_RETURN;
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_ecore_lock();
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if (!ECORE_MAGIC_CHECK(p, ECORE_MAGIC_PIPE))
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{
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ECORE_MAGIC_FAIL(p, ECORE_MAGIC_PIPE, "ecore_pipe_read_freeze");
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goto out;
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}
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if (p->fd_handler)
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{
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_ecore_main_fd_handler_del(p->fd_handler);
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p->fd_handler = NULL;
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}
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out:
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_ecore_unlock();
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}
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/**
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* Start monitoring again the pipe for reading. See ecore_pipe_freeze() for
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* stopping the monitoring activity. This will not work if
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* ecore_pipe_read_close() was previously called on the same pipe.
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*
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* @param p The Ecore_Pipe object.
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* @since 1.1
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*/
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EAPI void
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ecore_pipe_thaw(Ecore_Pipe *p)
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{
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EINA_MAIN_LOOP_CHECK_RETURN;
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_ecore_lock();
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if (!ECORE_MAGIC_CHECK(p, ECORE_MAGIC_PIPE))
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{
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ECORE_MAGIC_FAIL(p, ECORE_MAGIC_PIPE, "ecore_pipe_read_thaw");
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goto out;
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}
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if (!p->fd_handler && p->fd_read != PIPE_FD_INVALID)
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{
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p->fd_handler = ecore_main_fd_handler_add(p->fd_read,
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ECORE_FD_READ,
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_ecore_pipe_read,
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p,
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NULL, NULL);
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}
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out:
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_ecore_unlock();
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}
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/**
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* @brief Wait from another thread on the read side of a pipe.
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*
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* @param p The pipe to watch on.
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* @param message_count The minimal number of message to wait before exiting.
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* @param wait The amount of time in second to wait before exiting.
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* @return the number of message catched during that wait call.
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* @since 1.1
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*
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* Negative value for @p wait means infite wait.
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*/
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EAPI int
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ecore_pipe_wait(Ecore_Pipe *p,
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int message_count,
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double wait)
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{
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int r;
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_ecore_lock();
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r = _ecore_pipe_wait(p, message_count, wait);
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_ecore_unlock();
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return r;
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}
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/**
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* Close the write end of an Ecore_Pipe object created with ecore_pipe_add().
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*
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* @param p The Ecore_Pipe object.
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*/
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EAPI void
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ecore_pipe_write_close(Ecore_Pipe *p)
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{
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_ecore_lock();
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if (!ECORE_MAGIC_CHECK(p, ECORE_MAGIC_PIPE))
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{
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ECORE_MAGIC_FAIL(p, ECORE_MAGIC_PIPE, "ecore_pipe_write_close");
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goto out;
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}
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if (p->fd_write != PIPE_FD_INVALID)
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{
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pipe_close(p->fd_write);
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p->fd_write = PIPE_FD_INVALID;
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}
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out:
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_ecore_unlock();
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}
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/**
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* Write on the file descriptor the data passed as parameter.
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*
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* @param p The Ecore_Pipe object.
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* @param buffer The data to write into the pipe.
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* @param nbytes The size of the @p buffer in bytes
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* @return @c EINA_TRUE on a successful write, @c EINA_FALSE on error.
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*/
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EAPI Eina_Bool
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ecore_pipe_write(Ecore_Pipe *p,
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const void *buffer,
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unsigned int nbytes)
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{
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ssize_t ret;
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size_t already_written = 0;
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int retry = ECORE_PIPE_WRITE_RETRY;
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Eina_Bool ok = EINA_FALSE;
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_ecore_lock();
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if (!ECORE_MAGIC_CHECK(p, ECORE_MAGIC_PIPE))
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{
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ECORE_MAGIC_FAIL(p, ECORE_MAGIC_PIPE, "ecore_pipe_write");
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goto out;
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}
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if (p->delete_me) goto out;
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if (p->fd_write == PIPE_FD_INVALID) goto out;
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/* First write the len into the pipe */
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do
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{
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ret = pipe_write(p->fd_write, &nbytes, sizeof(nbytes));
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if (ret == sizeof(nbytes))
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{
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retry = ECORE_PIPE_WRITE_RETRY;
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break;
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}
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else if (ret > 0)
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{
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/* XXX What should we do here? */
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ERR("The length of the data was not written complete"
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" to the pipe");
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goto out;
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}
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else if (ret == PIPE_FD_ERROR && errno == EPIPE)
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{
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pipe_close(p->fd_write);
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p->fd_write = PIPE_FD_INVALID;
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goto out;
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}
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else if (ret == PIPE_FD_ERROR && errno == EINTR)
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/* try it again */
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;
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else
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{
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ERR("An unhandled error (ret: %zd errno: %d)"
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"occurred while writing to the pipe the length",
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ret, errno);
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}
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}
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while (retry--);
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if (retry != ECORE_PIPE_WRITE_RETRY) goto out;
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/* and now pass the data to the pipe */
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do
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{
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ret = pipe_write(p->fd_write,
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((unsigned char *)buffer) + already_written,
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nbytes - already_written);
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if (ret == (ssize_t)(nbytes - already_written))
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{
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ok = EINA_TRUE;
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goto out;
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}
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else if (ret >= 0)
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{
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already_written -= ret;
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continue;
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}
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else if (ret == PIPE_FD_ERROR && errno == EPIPE)
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{
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pipe_close(p->fd_write);
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p->fd_write = PIPE_FD_INVALID;
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goto out;
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}
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else if (ret == PIPE_FD_ERROR && errno == EINTR)
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/* try it again */
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;
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else
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{
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ERR("An unhandled error (ret: %zd errno: %d)"
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"occurred while writing to the pipe the length",
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ret, errno);
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}
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}
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while (retry--);
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out:
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_ecore_unlock();
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return ok;
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}
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/**
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* @}
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*/
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/* Private functions */
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Ecore_Pipe *
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_ecore_pipe_add(Ecore_Pipe_Cb handler,
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const void *data)
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{
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Ecore_Pipe *p = NULL;
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int fds[2];
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EINA_MAIN_LOOP_CHECK_RETURN_VAL(NULL);
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if (!handler) return NULL;
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p = ecore_pipe_calloc(1);
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if (!p) return NULL;
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if (pipe(fds))
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{
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ecore_pipe_mp_free(p);
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return NULL;
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}
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ECORE_MAGIC_SET(p, ECORE_MAGIC_PIPE);
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p->fd_read = fds[0];
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p->fd_write = fds[1];
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p->handler = handler;
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p->data = data;
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fcntl(p->fd_read, F_SETFL, O_NONBLOCK);
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p->fd_handler = ecore_main_fd_handler_add(p->fd_read,
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ECORE_FD_READ,
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_ecore_pipe_read,
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p,
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NULL, NULL);
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return p;
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}
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void *
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_ecore_pipe_del(Ecore_Pipe *p)
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{
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void *data = NULL;
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if (!ECORE_MAGIC_CHECK(p, ECORE_MAGIC_PIPE))
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{
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ECORE_MAGIC_FAIL(p, ECORE_MAGIC_PIPE, "ecore_pipe_del");
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return NULL;
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}
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p->delete_me = EINA_TRUE;
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if (p->handling > 0) return (void *)p->data;
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if (p->fd_handler) _ecore_main_fd_handler_del(p->fd_handler);
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if (p->fd_read != PIPE_FD_INVALID) pipe_close(p->fd_read);
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if (p->fd_write != PIPE_FD_INVALID) pipe_close(p->fd_write);
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data = (void *)p->data;
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ecore_pipe_mp_free(p);
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return data;
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}
|
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|
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int
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_ecore_pipe_wait(Ecore_Pipe *p,
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int message_count,
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double wait)
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{
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struct timeval tv, *t;
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fd_set rset;
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double end = 0.0;
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double timeout;
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int ret;
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int total = 0;
|
|
|
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EINA_MAIN_LOOP_CHECK_RETURN_VAL(-1);
|
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if (p->fd_read == PIPE_FD_INVALID)
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return -1;
|
|
|
|
FD_ZERO(&rset);
|
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FD_SET(p->fd_read, &rset);
|
|
|
|
if (wait >= 0.0)
|
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end = ecore_loop_time_get() + wait;
|
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timeout = wait;
|
|
|
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while (message_count > 0 && (timeout > 0.0 || wait <= 0.0))
|
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{
|
|
if (wait >= 0.0)
|
|
{
|
|
/* finite() tests for NaN, too big, too small, and infinity. */
|
|
if ((!ECORE_FINITE(timeout)) || (timeout == 0.0))
|
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{
|
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tv.tv_sec = 0;
|
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tv.tv_usec = 0;
|
|
}
|
|
else if (timeout > 0.0)
|
|
{
|
|
int sec, usec;
|
|
#ifdef FIX_HZ
|
|
timeout += (0.5 / HZ);
|
|
sec = (int)timeout;
|
|
usec = (int)((timeout - (double)sec) * 1000000);
|
|
#else
|
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sec = (int)timeout;
|
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usec = (int)((timeout - (double)sec) * 1000000);
|
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#endif
|
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tv.tv_sec = sec;
|
|
tv.tv_usec = usec;
|
|
}
|
|
t = &tv;
|
|
}
|
|
else
|
|
{
|
|
t = NULL;
|
|
}
|
|
|
|
ret = main_loop_select(p->fd_read + 1, &rset, NULL, NULL, t);
|
|
|
|
if (ret > 0)
|
|
{
|
|
_ecore_pipe_read(p, NULL);
|
|
message_count -= p->message;
|
|
total += p->message;
|
|
p->message = 0;
|
|
}
|
|
else if (ret == 0)
|
|
{
|
|
break;
|
|
}
|
|
else if (errno != EINTR)
|
|
{
|
|
close(p->fd_read);
|
|
p->fd_read = PIPE_FD_INVALID;
|
|
break;
|
|
}
|
|
|
|
if (wait >= 0.0)
|
|
timeout = end - ecore_loop_time_get();
|
|
}
|
|
|
|
return total;
|
|
}
|
|
|
|
static void
|
|
_ecore_pipe_unhandle(Ecore_Pipe *p)
|
|
{
|
|
p->handling--;
|
|
if (p->delete_me)
|
|
{
|
|
_ecore_pipe_del(p);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_ecore_pipe_handler_call(Ecore_Pipe *p,
|
|
unsigned char *buf,
|
|
size_t len)
|
|
{
|
|
void *data = (void*) p->data;
|
|
if (!p->delete_me)
|
|
{
|
|
_ecore_unlock();
|
|
p->handler(data, buf, len);
|
|
_ecore_lock();
|
|
}
|
|
}
|
|
|
|
static Eina_Bool
|
|
_ecore_pipe_read(void *data,
|
|
Ecore_Fd_Handler *fd_handler EINA_UNUSED)
|
|
{
|
|
Ecore_Pipe *p = (Ecore_Pipe *)data;
|
|
int i;
|
|
|
|
p->handling++;
|
|
for (i = 0; i < 16; i++)
|
|
{
|
|
ssize_t ret;
|
|
|
|
/* if we already have read some data we don't need to read the len
|
|
* but to finish the already started job
|
|
*/
|
|
if (p->len == 0)
|
|
{
|
|
/* read the len of the passed data */
|
|
ret = pipe_read(p->fd_read, &p->len, sizeof(p->len));
|
|
|
|
/* catch the non error case first */
|
|
/* read amount ok - nothing more to do */
|
|
if (ret == sizeof(p->len))
|
|
;
|
|
else if (ret > 0)
|
|
{
|
|
/* we got more data than we asked for - definite error */
|
|
ERR("Only read %i bytes from the pipe, although"
|
|
" we need to read %i bytes.",
|
|
(int)ret, (int)sizeof(p->len));
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_CANCEL;
|
|
}
|
|
else if (ret == 0)
|
|
{
|
|
/* we got no data */
|
|
if (i == 0)
|
|
{
|
|
/* no data on first try through means an error */
|
|
_ecore_pipe_handler_call(p, NULL, 0);
|
|
if (p->passed_data) free(p->passed_data);
|
|
p->passed_data = NULL;
|
|
p->already_read = 0;
|
|
p->len = 0;
|
|
p->message++;
|
|
pipe_close(p->fd_read);
|
|
p->fd_read = PIPE_FD_INVALID;
|
|
p->fd_handler = NULL;
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_CANCEL;
|
|
}
|
|
else
|
|
{
|
|
/* no data after first loop try is ok */
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
}
|
|
#ifndef _WIN32
|
|
else if ((ret == PIPE_FD_ERROR) &&
|
|
((errno == EINTR) || (errno == EAGAIN)))
|
|
{
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
else
|
|
{
|
|
ERR("An unhandled error (ret: %i errno: %i [%s])"
|
|
"occurred while reading from the pipe the length",
|
|
(int)ret, errno, strerror(errno));
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
#else
|
|
else /* ret == PIPE_FD_ERROR is the only other case on Windows */
|
|
{
|
|
if (WSAGetLastError() != WSAEWOULDBLOCK)
|
|
{
|
|
_ecore_pipe_handler_call(p, NULL, 0);
|
|
if (p->passed_data) free(p->passed_data);
|
|
p->passed_data = NULL;
|
|
p->already_read = 0;
|
|
p->len = 0;
|
|
p->message++;
|
|
pipe_close(p->fd_read);
|
|
p->fd_read = PIPE_FD_INVALID;
|
|
p->fd_handler = NULL;
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_CANCEL;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* if somehow we got less than or equal to 0 we got an errnoneous
|
|
* messages so call callback with null and len we got. this case should
|
|
* never happen */
|
|
if (p->len == 0)
|
|
{
|
|
_ecore_pipe_handler_call(p, NULL, 0);
|
|
/* reset all values to 0 */
|
|
if (p->passed_data) free(p->passed_data);
|
|
p->passed_data = NULL;
|
|
p->already_read = 0;
|
|
p->len = 0;
|
|
p->message++;
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
|
|
/* we dont have a buffer to hold the data, so alloc it */
|
|
if (!p->passed_data)
|
|
{
|
|
p->passed_data = malloc(p->len);
|
|
/* alloc failed - error case */
|
|
if (!p->passed_data)
|
|
{
|
|
_ecore_pipe_handler_call(p, NULL, 0);
|
|
/* close the pipe */
|
|
p->already_read = 0;
|
|
p->len = 0;
|
|
p->message++;
|
|
pipe_close(p->fd_read);
|
|
p->fd_read = PIPE_FD_INVALID;
|
|
p->fd_handler = NULL;
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_CANCEL;
|
|
}
|
|
}
|
|
|
|
/* and read the passed data */
|
|
ret = pipe_read(p->fd_read,
|
|
((unsigned char *)p->passed_data) + p->already_read,
|
|
p->len - p->already_read);
|
|
|
|
/* catch the non error case first */
|
|
/* if we read enough data to finish the message/buffer */
|
|
if (ret == (ssize_t)(p->len - p->already_read))
|
|
{
|
|
_ecore_pipe_handler_call(p, p->passed_data, p->len);
|
|
free(p->passed_data);
|
|
/* reset all values to 0 */
|
|
p->passed_data = NULL;
|
|
p->already_read = 0;
|
|
p->len = 0;
|
|
p->message++;
|
|
}
|
|
else if (ret > 0)
|
|
{
|
|
/* more data left to read */
|
|
p->already_read += ret;
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
else if (ret == 0)
|
|
{
|
|
/* 0 bytes to read - could be more to read next select wake up */
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
#ifndef _WIN32
|
|
else if ((ret == PIPE_FD_ERROR) &&
|
|
((errno == EINTR) || (errno == EAGAIN)))
|
|
{
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
else
|
|
{
|
|
ERR("An unhandled error (ret: %zd errno: %d)"
|
|
"occurred while reading from the pipe the data",
|
|
ret, errno);
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
#else
|
|
else /* ret == PIPE_FD_ERROR is the only other case on Windows */
|
|
{
|
|
if (WSAGetLastError() != WSAEWOULDBLOCK)
|
|
{
|
|
_ecore_pipe_handler_call(p, NULL, 0);
|
|
if (p->passed_data) free(p->passed_data);
|
|
p->passed_data = NULL;
|
|
p->already_read = 0;
|
|
p->len = 0;
|
|
p->message++;
|
|
pipe_close(p->fd_read);
|
|
p->fd_read = PIPE_FD_INVALID;
|
|
p->fd_handler = NULL;
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_CANCEL;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
_ecore_pipe_unhandle(p);
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
|