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1 theory Finite_current |
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2 imports Main Valid_prop Flask Flask_type Proc_fd_of_file_prop |
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3 begin |
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4 |
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5 context flask begin |
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6 |
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7 lemma finite_cf: "valid \<tau> \<Longrightarrow> finite (current_files \<tau>)" |
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8 apply (induct \<tau>) |
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9 apply (simp add:current_files_def inum_of_file.simps) |
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10 apply (rule_tac B = "init_files" in finite_subset) |
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11 apply (clarsimp dest!:inof_has_file_tag, simp add:init_finite_sets) |
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12 |
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13 apply (frule vt_grant_os, frule vd_cons, simp, case_tac a) |
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14 |
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15 apply (auto simp:current_files_def os_grant.simps inum_of_file.simps split:if_splits option.splits) |
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16 apply (rule_tac B = "insert list {f. \<exists>i. inum_of_file \<tau> f = Some i}" in finite_subset, clarsimp, simp) |
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17 apply (rule_tac B = "{f. \<exists>i. inum_of_file \<tau> f = Some i}" in finite_subset, clarsimp, simp) |
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18 apply (rule_tac B = "{f. \<exists>i. inum_of_file \<tau> f = Some i}" in finite_subset, clarsimp, simp) |
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19 apply (rule_tac B = "{f. \<exists>i. inum_of_file \<tau> f = Some i}" in finite_subset, clarsimp, simp) |
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20 apply (rule_tac B = "insert list {f. \<exists>i. inum_of_file \<tau> f = Some i}" in finite_subset, clarsimp, simp) |
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21 apply (rule_tac B = "insert list2 {f. \<exists>i. inum_of_file \<tau> f = Some i}" in finite_subset, clarsimp, simp) |
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22 done |
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23 |
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24 lemma finite_cp: "finite (current_procs \<tau>)" |
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25 apply (induct \<tau>) |
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26 apply (simp add:current_procs.simps init_finite_sets) |
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27 apply (case_tac a, auto simp:current_procs.simps) |
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28 done |
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29 |
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30 lemma finite_cfd: "valid \<tau> \<Longrightarrow> finite (current_proc_fds \<tau> p)" |
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31 apply (induct \<tau> arbitrary:p) |
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32 apply (simp add:current_proc_fds.simps init_finite_sets) |
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33 apply (frule vd_cons, frule vt_grant_os, case_tac a, auto simp:current_proc_fds.simps) |
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34 apply (erule finite_subset) |
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35 apply (frule_tac s = \<tau> and p = nat in file_fds_subset_pfds) |
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36 apply (erule finite_subset, simp) |
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37 apply (erule finite_subset) |
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38 apply (frule_tac s = \<tau> and p = nat1 in file_fds_subset_pfds) |
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39 apply (erule finite_subset, simp) |
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40 done |
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41 |
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42 lemma finite_pair: "\<lbrakk>finite A; finite B\<rbrakk> \<Longrightarrow> finite {(x, y). x \<in> A \<and> y \<in> B}" |
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43 by auto |
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44 |
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45 lemma finite_UN_I': "\<lbrakk>finite X; \<forall> x. x \<in> X \<longrightarrow> finite (f x)\<rbrakk> \<Longrightarrow> finite {(x, y). x \<in> X \<and> y \<in> f x}" |
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46 apply (frule_tac B = f in finite_UN_I, simp) |
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47 apply (drule_tac finite_pair, simp) |
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48 apply (rule_tac B = "{(x, y). x \<in> X \<and> y \<in> (\<Union>a\<in>X. f a)}" in finite_subset, auto) |
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49 done |
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50 |
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51 lemma finite_init_netobjs: "finite init_sockets" |
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52 apply (subgoal_tac "finite {(p, fd). p \<in> init_procs \<and> fd \<in> init_fds_of_proc p}") |
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53 apply (rule_tac B = "{(p, fd). p \<in> init_procs \<and> fd \<in> init_fds_of_proc p}" in finite_subset) |
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54 apply (clarsimp dest!:init_socket_has_inode, simp) |
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55 using init_finite_sets finite_UN_I' |
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56 by (metis Collect_mem_eq SetCompr_Sigma_eq internal_split_def) |
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57 |
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58 lemma finite_cn_aux: "valid \<tau> \<Longrightarrow> finite {s. \<exists>i. inum_of_socket \<tau> s = Some i}" |
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59 apply (induct \<tau>) |
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60 apply (rule_tac B = "init_sockets" in finite_subset) |
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61 apply (clarsimp simp:inum_of_socket.simps dest!:inos_has_sock_tag, simp add:finite_init_netobjs) |
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62 |
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63 apply (frule vd_cons, frule vt_grant_os, simp, case_tac a) |
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64 apply (auto split:option.splits if_splits) |
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65 apply (rule_tac B = "{s. \<exists>i. inum_of_socket \<tau> s = Some i}" in finite_subset, clarsimp split:if_splits, simp) |
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66 apply (rule_tac B = "{s. \<exists>i. inum_of_socket \<tau> s = Some i} \<union> {(p, fd). \<exists> i. inum_of_socket \<tau> (nat1, fd) = Some i \<and> p = nat2 \<and> fd \<in> set}" in finite_subset, clarsimp split:if_splits) |
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67 apply (simp only:finite_Un, rule conjI, simp) |
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68 apply (rule_tac B = "{(p, fd). \<exists> i. inum_of_socket \<tau> (nat1, fd) = Some i \<and> p = nat2}" in finite_subset, clarsimp) |
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69 apply (drule_tac h = "\<lambda> (p, fd). if (p = nat1) then (nat2, fd) else (p, fd)" in finite_imageI) |
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70 apply (rule_tac B = "((\<lambda>(p, fd). if p = nat1 then (nat2, fd) else (p, fd)) ` {a. \<exists>i. inum_of_socket \<tau> a = Some i})" in finite_subset) |
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71 apply (rule subsetI,erule CollectE, case_tac x, simp, (erule exE|erule conjE)+) |
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72 unfolding image_def |
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73 apply (rule CollectI, rule_tac x = "(nat1, b)" in bexI, simp+) |
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74 apply (rule_tac B = "{s. \<exists>i. inum_of_socket \<tau> s = Some i}" in finite_subset, clarsimp split:if_splits, simp)+ |
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75 apply (rule_tac B = "insert (nat1, nat2) {s. \<exists>i. inum_of_socket \<tau> s = Some i}" in finite_subset, clarsimp, simp) |
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76 apply (rule_tac B = "insert (nat1, nat4) {s. \<exists>i. inum_of_socket \<tau> s = Some i}" in finite_subset, clarsimp, simp) |
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77 done |
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78 |
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79 lemma finite_cn: "valid \<tau> \<Longrightarrow> finite (current_sockets \<tau>)" |
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80 apply (simp add:current_sockets_def inum_of_socket.simps) |
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81 using finite_cn_aux[where \<tau> = \<tau>] by auto |
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82 |
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83 (* |
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84 lemma finite_ch: "finite (current_shms \<tau>)" |
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85 apply (induct \<tau>) defer |
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86 apply (case_tac a, auto simp:current_shms.simps init_finite_sets) |
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87 done |
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88 *) |
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89 |
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90 lemma finite_cm: "finite (current_msgqs \<tau>)" |
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91 apply (induct \<tau>) defer |
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92 apply (case_tac a, auto simp: init_finite_sets) |
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93 done |
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94 |
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95 |
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96 lemma finite_option: "finite {x. \<exists> y. f x = Some y} \<Longrightarrow> finite {y. \<exists> x. f x = Some y}" |
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97 apply (drule_tac h = f in finite_imageI) |
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98 apply (clarsimp simp only:image_def) |
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99 apply (rule_tac f = Some in finite_imageD) |
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100 apply (rule_tac B = "{y. \<exists>x. (\<exists>y. f x = Some y) \<and> y = f x}" in finite_subset) |
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101 unfolding image_def |
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102 apply auto |
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103 done |
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104 |
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105 lemma finite_ci: "valid \<tau> \<Longrightarrow> finite (current_inode_nums \<tau>)" |
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106 apply (simp add:current_inode_nums_def current_file_inums_def current_sock_inums_def) |
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107 apply (rule conjI, drule finite_cf, simp add:current_files_def, erule finite_option) |
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108 using finite_cn[where \<tau> = \<tau>] |
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109 apply (simp add:current_sockets_def, drule_tac finite_option, simp) |
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110 done |
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111 |
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112 end |
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113 |
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114 end |
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115 |
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116 |