db-mysql/mysql-loader.lisp

   1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
   2 ;;;; *************************************************************************
   3 ;;;; FILE IDENTIFICATION
   4 ;;;;
   5 ;;;; Name:          mysql-loader.sql
   6 ;;;; Purpose:       MySQL library loader using UFFI
   7 ;;;; Programmers:   Kevin M. Rosenberg
   8 ;;;; Date Started:  Feb 2002
   9 ;;;;
  10 ;;;; $Id$
  11 ;;;;
  12 ;;;; This file, part of CLSQL, is Copyright (c) 2002 by Kevin M. Rosenberg
  13 ;;;;
  14 ;;;; CLSQL users are granted the rights to distribute and use this software
  15 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
  16 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
  17 ;;;; *************************************************************************
  18
  19 (in-package #:mysql)
  20
  21 ;;;; Modified by Kevin Rosenberg
  22 ;;;;  - probe potential directories to find library
  23 ;;;;  - Changed from CMUCL functions to UFFI to
  24 ;;;;      -- prevent library from being loaded multiple times
  25 ;;;;      -- support Allegro CL and Lispworks
  26
  27 (defparameter *clsql-mysql-library-path*
  28   (uffi:find-foreign-library
  29    "mysql"
  30    `(,(make-pathname :directory (pathname-directory *load-truename*))
  31      "/usr/lib/clsql/"
  32      "/sw/lib/clsql/"
  33      "/home/kevin/debian/src/clsql/db-mysql/")
  34    :drive-letters '("C")))
  35
  36 (defparameter *libz-library-path*
  37   (uffi:find-foreign-library
  38    '("libz" "zlib")
  39    `(,(make-pathname :directory (pathname-directory *load-truename*))
  40       "/usr/lib/"
  41       "/sw/lib/"
  42       "/usr/local/lib/"
  43        "/home/kevin/debian/src/clsql/db-mysql/"
  44        "/mysql/lib/dll32/"
  45        "/mysql/lib/opt/")
  46    :drive-letters '("C")))
  47
  48 (defvar *mysql-library-candidate-names*
  49     '("libmysqlclient" "libmysql"))
  50
  51 (defparameter *mysql-library-candidate-directories*
  52     `(,(pathname-directory *load-pathname*)
  53       "/opt/mysql/lib/mysql/" "/usr/local/lib/" "/usr/lib/" "/usr/local/lib/mysql/" "/usr/lib/mysql/" "/mysql/lib/opt/" "/sw/lib/mysql/"))
  54
  55 (defvar *mysql-library-candidate-drive-letters* '("C" "D" "E"))
  56
  57 (defvar *mysql-supporting-libraries* '("c")
  58   "Used only by CMU. List of library flags needed to be passed to ld to
  59 load the MySQL client library succesfully.  If this differs at your site,
  60 set to the right path before compiling or loading the system.")
  61
  62 (defvar *mysql-library-loaded* nil
  63   "T if foreign library was able to be loaded successfully")
  64
  65 (defmethod clsql-base-sys:database-type-library-loaded ((database-type (eql :mysql)))
  66   *mysql-library-loaded*)
  67
  68 (defmethod clsql-base-sys:database-type-load-foreign ((database-type (eql :mysql)))
  69   (let ((mysql-path
  70          (uffi:find-foreign-library *mysql-library-candidate-names*
  71                                     *mysql-library-candidate-directories*
  72                                     :drive-letters
  73                                     *mysql-library-candidate-drive-letters*)))
  74     (unless (probe-file mysql-path)
  75       (error "Can't find mysql client library to load"))
  76     (uffi:load-foreign-library *libz-library-path*)
  77     (uffi:load-foreign-library mysql-path
  78                                :module "mysql"
  79                                :supporting-libraries
  80                                *mysql-supporting-libraries*)
  81     (uffi:load-foreign-library *clsql-mysql-library-path*
  82                                :module "clsql-mysql"
  83                                :supporting-libraries
  84                                (append *mysql-supporting-libraries*)))
  85   (setq *mysql-library-loaded* t))
  86
  87
  88 (clsql-base-sys:database-type-load-foreign :mysql)
  89