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annotate rust/pyo3-sharedref/tests/test_sharedref.rs @ 52664:f5091286b10c

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packaging: modernize (compat PEP 517) with less distutils and setup.py calls - setup.py: less distutils imports and setuptools required distutils is deprecated and one should import commands from setuptools to support modern workflows depending on PEP 517 and 518. Moreover, for Python >=3.12, distutils comes from setuptools. It corresponds to old and unmaintain code that do not support PEP 517. The PEP 517 frontends (pip, build, pipx, PDM, UV, etc.) are responsible for creating a venv just for the build. The build dependencies (currently only setuptools) are specified in the pyproject.toml file. Therefore, there is no reason to support building without setuptools. Calling directly setup.py is deprecated and we have to use a PEP 517 frontend. For this commit we use pip with venv. - run-tests.py: install with pip instead of direct call of setup.py Mercurial is then built in an isolated environment. - Makefile: use venv+pip instead of setup.py
author paugier <pierre.augier@univ-grenoble-alpes.fr>
date Wed, 08 Jan 2025 05:07:00 +0100
parents ac0cb3c334a1
children
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1 use pyo3::prelude::*;
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2 use pyo3_sharedref::*;
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3
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4 #[pyclass]
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5 struct Owner {
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6 string: PyShareable<String>,
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7 }
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8
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9 #[pymethods]
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10 impl Owner {
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11 #[new]
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12 fn new(s: String) -> Self {
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13 Self { string: s.into() }
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14 }
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15 }
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16
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17 fn with_setup(
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18 test: impl FnOnce(Python<'_>, &Bound<'_, Owner>) -> PyResult<()>,
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19 ) -> PyResult<()> {
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20 pyo3::prepare_freethreaded_python();
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21 Python::with_gil(|py| {
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22 let owner = Bound::new(py, Owner::new("new".to_owned()))?;
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23 test(py, &owner)
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24 })
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25 }
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26
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27 /// "leak" in the sense of `SharedByPyObject` the `string` data field,
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28 /// taking care of all the boilerplate
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29 fn share_string(
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30 owner: &Bound<'_, Owner>,
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31 ) -> SharedByPyObject<&'static String> {
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32 let shareable = &owner.borrow().string;
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33 unsafe { shareable.share(owner) }
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34 }
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35
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36 fn try_share_string(
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37 owner: &Bound<'_, Owner>,
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38 ) -> Result<SharedByPyObject<&'static String>, TryShareError> {
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39 let shareable = &owner.borrow().string;
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40 unsafe { shareable.try_share(owner) }
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41 }
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42
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43 /// Mutate the `string` field of `owner` as would be done from Python code
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44 ///
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45 /// This is to simulate normal mutation of the owner object from
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46 /// the Python interpreter. This could be replaced by methods of [`Owner`]
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47 /// (wih closure replaced by a small fixed operations)
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48 /// and perhaps will, once we are done converting the original tests
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49 /// from rust-cpython
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50 fn mutate_string<'py>(
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51 owner: &'py Bound<'py, Owner>,
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52 f: impl FnOnce(&mut String),
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53 ) -> () {
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54 let shareable = &owner.borrow_mut().string;
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55 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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56 f(&mut shared_ref.write());
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57 }
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58
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59 #[test]
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60 fn test_shared_borrow() -> PyResult<()> {
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61 with_setup(|py, owner| {
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62 let shared = share_string(owner);
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63 let shared_ref = unsafe { shared.try_borrow(py) }.unwrap();
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64 assert_eq!(*shared_ref, "new");
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65 Ok(())
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66 })
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67 }
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68
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69 #[test]
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70 fn test_shared_borrow_mut() -> PyResult<()> {
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71 with_setup(|py, owner| {
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72 let shared = share_string(owner);
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73 let mut shared_iter = unsafe { shared.map(py, |s| s.chars()) };
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74 let mut shared_ref =
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75 unsafe { shared_iter.try_borrow_mut(py) }.unwrap();
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76 assert_eq!(shared_ref.next(), Some('n'));
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77 assert_eq!(shared_ref.next(), Some('e'));
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78 assert_eq!(shared_ref.next(), Some('w'));
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79 assert_eq!(shared_ref.next(), None);
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80 Ok(())
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81 })
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82 }
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83
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84 #[test]
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85 fn test_shared_borrow_after_mut() -> PyResult<()> {
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86 with_setup(|py, owner| {
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87 let shared = share_string(owner);
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88 mutate_string(owner, String::clear);
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89 assert!(unsafe { shared.try_borrow(py) }.is_err());
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90 Ok(())
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91 })
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92 }
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93
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94 #[test]
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95 fn test_shared_borrow_mut_after_mut() -> PyResult<()> {
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96 with_setup(|py, owner| {
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97 let shared = share_string(owner);
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98 let mut shared_iter = unsafe { shared.map(py, |s| s.chars()) };
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99
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100 mutate_string(owner, String::clear);
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101 assert!(unsafe { shared_iter.try_borrow_mut(py) }.is_err());
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102 Ok(())
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103 })
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104 }
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105
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106 #[test]
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107 #[should_panic(expected = "map() over invalidated shared reference")]
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108 fn test_shared_map_after_mut() {
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109 with_setup(|py, owner| {
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110 let shared = share_string(owner);
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111 mutate_string(owner, String::clear);
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112 let _shared_iter = unsafe { shared.map(py, |s| s.chars()) };
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113 Ok(())
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114 })
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115 .expect("should already have panicked")
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116 }
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117
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118 /// run `try_borrow_mut` on the `string` field and assert it is not an error
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119 ///
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120 /// Simply returning the `Result` is not possible, because that is
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121 /// returning a reference to data owned by the function
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122 fn assert_try_write_string_ok(owner: &Bound<'_, Owner>) {
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123 let shareable = &owner.borrow().string;
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124 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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125 assert!(shared_ref.try_write().is_ok());
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126 }
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127
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128 fn assert_try_write_string_err(owner: &Bound<'_, Owner>) {
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129 let shareable = &owner.borrow().string;
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130 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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131 assert!(shared_ref.try_write().is_err());
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132 }
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133
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134 fn assert_try_read_string_err(owner: &Bound<'_, Owner>) {
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135 let shareable = &owner.borrow().string;
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136 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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137 assert!(shared_ref.try_read().is_err());
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138 }
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139
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140 #[test]
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141 fn test_try_write_while_shared_ref() -> PyResult<()> {
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142 with_setup(|py, owner| {
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143 assert_try_write_string_ok(owner);
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144 let shared = share_string(owner);
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145 {
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146 let _shared_ref = unsafe { shared.try_borrow(py) }.unwrap();
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147 assert_try_write_string_err(owner);
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148 {
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149 let _shared_ref2 = unsafe { shared.try_borrow(py) }.unwrap();
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150 assert_try_write_string_err(owner);
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151 }
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152 assert_try_write_string_err(owner);
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153 }
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154 assert_try_write_string_ok(owner);
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155 Ok(())
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156 })
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157 }
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158
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159 #[test]
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160 fn test_try_write_while_shared_ref_mut() -> PyResult<()> {
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161 with_setup(|py, owner| {
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162 assert_try_write_string_ok(owner);
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163 let shared = share_string(owner);
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164 let mut shared_iter = unsafe { shared.map(py, |s| s.chars()) };
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165 {
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166 let _shared_ref =
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167 unsafe { shared_iter.try_borrow_mut(py) }.unwrap();
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168 assert_try_write_string_err(owner);
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169 }
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170 assert_try_write_string_ok(owner);
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171 Ok(())
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172 })
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173 }
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174
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175 #[test]
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176 fn test_try_share_while_write() -> PyResult<()> {
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177 with_setup(|_py, owner| {
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178 let shareable = &owner.borrow().string;
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179 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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180 let _mut_ref = shared_ref.write();
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181
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182 assert!(try_share_string(owner).is_err());
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183 Ok(())
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184 })
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185 }
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186
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187 #[test]
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188 #[should_panic(expected = "already mutably borrowed")]
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189 fn test_share_while_write() {
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190 with_setup(|_py, owner| {
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191 let shareable = &owner.borrow().string;
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192 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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193 let _mut_ref = shared_ref.write();
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194
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195 share_string(owner);
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196 Ok(())
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197 })
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198 .expect("should already have panicked")
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199 }
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200
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201 #[test]
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202 fn test_try_write_while_borrow() -> PyResult<()> {
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203 with_setup(|_py, owner| {
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204 let shareable = &owner.borrow().string;
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205 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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206 let _ref = shared_ref.read();
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207
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208 assert_try_write_string_err(owner);
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209 Ok(())
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210 })
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211 }
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212
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213 #[test]
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214 #[should_panic(expected = "already borrowed")]
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215 fn test_write_while_borrow() {
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216 with_setup(|_py, owner| {
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217 let shareable = &owner.borrow().string;
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218 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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219 let _ref = shared_ref.read();
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220
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221 let shared_ref2 = unsafe { shareable.borrow_with_owner(owner) };
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222 let _mut_ref = shared_ref2.write();
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223 Ok(())
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224 })
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225 .expect("should already have panicked")
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226 }
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227
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228 #[test]
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229 fn test_try_borrow_while_write() -> PyResult<()> {
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230 with_setup(|_py, owner| {
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231 let shareable = &owner.borrow().string;
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232 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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233 let _mut_ref = shared_ref.write();
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234
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235 assert_try_read_string_err(owner);
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236 Ok(())
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237 })
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238 }
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239
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240 #[test]
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241 #[should_panic(expected = "already mutably borrowed")]
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242 fn test_borrow_while_write() {
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243 with_setup(|_py, owner| {
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244 let shareable = &owner.borrow().string;
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245 let shared_ref = unsafe { shareable.borrow_with_owner(owner) };
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246 let _mut_ref = shared_ref.write();
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247
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248 let shared_ref2 = unsafe { shareable.borrow_with_owner(owner) };
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249 let _ref = shared_ref2.read();
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250 Ok(())
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251 })
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252 .expect("should already have panicked")
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253 }