The Julia Language V1.12.2 The Julia Project November 22, 2025 Contents Contents i I Manual 1 1 Julia 1.12 Documentation 2 1.1 Important Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Julia Compared to Other Languages . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.4 Julia Standard Modules and the Standard Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323 25 Multi-Threading 324 25.1 Starting Julia with multiple threads . . . . . . . . . . . . . . . . . . . . . . . . . . . 324 25.2 Threadpools

The Julia Language V1.10.11 The Julia Project March 14,2026 Contents Contents Contents i 1 Manual 1 1 Julia 1.10 Documentation 2 1.1 Important Links 2 1.2 Introduction 2 1.3 Julia Compared to Other Languages 296 23.3 More task operations 300 23.4 Tasks and events 300 24 Multi-Threading 302 24.1 Starting Julia with multiple threads 302 24.2 Threadpools 303 24.3 Communication and synchronization 304 24.4 The and profiling 378 30 Embedding Julia 380 30.1 High-Level Embedding 380 30.2 High-Level Embedding on Windows with Visual Studio 382 30.3 Converting Types 383 30.4 Calling Julia Functions 384 30.5 Memory Management

The Julia Language V1.12.6 The Julia Project April 11,2026 Contents Contents Contents i 1 Manual 1 1 Julia 1.12 Documentation 2 1.1 Introduction 2 1.2 Julia Compared to Other Languages 2 1.3 Important 308 24.3 More task operations 312 24.4 Tasks and events 313 25 Multi-Threading 314 25.1 Starting Julia with multiple threads 314 25.2 Threadpools 316 25.3 The @threads Macro 317 25.4 Communication and Calling C and Fortran Code 360 28.1 Creating C-Compatible Julia Function Pointers 362 28.2 Mapping C Types to Julia 364 28.3 Mapping C Functions to Julia 370 28.4 C Wrapper Examples 373 28.5 Fortran Wrapper

The Julia Language V1.12.3 The Julia Project December 16,2025 Contents Contents Contents i 1 Manual 1 1 Julia 1.12 Documentation 2 1.1 Introduction 2 1.2 Julia Compared to Other Languages 2 1.3 Important More task operations 319 24.4 Tasks and events 320 CONTENTS 25 Multi-Threading 321 25.1 Starting Julia with multiple threads 321 25.2 Threadpools 323 25.3 The @threads Macro 324 25.4 Communication and Calling C and Fortran Code 369 28.1 Creating C-Compatible Julia Function Pointers 371 28.2 Mapping C Types to Julia 373 28.3 Mapping C Functions to Julia 380 28.4 C Wrapper Examples 382 28.5 Fortran Wrapper

The Julia Language V1.12.5 The Julia Project March 14,2026 Contents Contents Contents i 1 Manual 1 1 Julia 1.12 Documentation 2 1.1 Introduction 2 1.2 Julia Compared to Other Languages 2 1.3 Important 308 24.3 More task operations 312 24.4 Tasks and events 313 25 Multi-Threading 314 25.1 Starting Julia with multiple threads 314 25.2 Threadpools 316 25.3 The @threads Macro 317 25.4 Communication and Calling C and Fortran Code 360 28.1 Creating C-Compatible Julia Function Pointers 362 28.2 Mapping C Types to Julia 364 28.3 Mapping C Functions to Julia 370 28.4 C Wrapper Examples 373 28.5 Fortran Wrapper

The Julia Language The Julia Project March 14,2026 Contents Contents i I Manual 1 1 Julia 1.6-beta1 Documentation 3 Introduction 3 2 Getting Started 5 2.1 Resources 6 3 Variables 7 3.1 Allowed Variable 261 23.3 More task operations 263 23.4 Tasks and events 264 24 Multi-Threading 265 24.1 Starting Julia with multiple threads 265 24.2 Data-race freedom 266 24.3 The @threads Macro 267 24.4 Atomic Operations Example 300 27 Calling C and Fortran Code 303 27.1 Creating C-Compatible Julia Function Pointers 305 27.2 Mapping C Types to Julia 307 Automatic Type Conversion 307 Type Correspondences 307 Bits Types

The Julia Language The Julia Project March 14,2026 Contents Contents i I Manual 1 1 Julia 1.6-rc3 Documentation 3 Introduction 3 2 Getting Started 5 2.1 Resources 6 3 Variables 7 3.1 Allowed Variable Names 261 23.3 More task operations 263 23.4 Tasks and events 264 24 Multi-Threading 265 24.1 Starting Julia with multiple threads 265 24.2 Data-race freedom 266 24.3 The @threads Macro 267 24.4 Atomic Operations Example 300 27 Calling C and Fortran Code 303 27.1 Creating C-Compatible Julia Function Pointers 305 27.2 Mapping C Types to Julia 307 Automatic Type Conversion 307 Type Correspondences 307 Bits Types

The Julia Language V1.13.0-rc1 The Julia Project April 27,2026 Contents Contents Contents 1 Manual 1 1 Julia 1.13-rc1 Documentation 2 1.1 Introduction 2 1.2 Julia Compared to Other Languages 2 1.3 Important 311 24.3 More task operations 315 24.4 Tasks and events 316 25 Multi-Threading 317 25.1 Starting Julia with multiple threads 317 25.2 Threadpools 319 25.3 The @threads Macro 320 25.4 Communication and Calling C and Fortran Code 365 28.1 Creating C-Compatible Julia Function Pointers 367 28.2 Mapping C Types to Julia 369 28.3 Mapping C Functions to Julia 376 28.4 C Wrapper Examples 378 28.5 Fortran Wrapper

The Julia Language V1.8.0-rc2.0 The Julia Project March 14,2026 Contents Contents Contents i 1 Manual 1 1 Julia 1.8-rc2 Documentation 2 2 Getting Started 5 2.1 Resources 6 3 Variables 7 3.1 Allowed Variable 280 23.3 More task operations 284 23.4 Tasks and events 284 24 Multi-Threading 286 24.1 Starting Julia with multiple threads 286 24.2 Data-race freedom 287 24.3 The @threads Macro 288 24.4 Atomic Operations Calling C and Fortran Code 327 27.1 Creating C-Compatible Julia Function Pointers 330 27.2 Mapping C Types to Julia 331 27.3 Mapping C Functions to Julia 337 27.4 C Wrapper Examples 340 27.5 Fortran Wrapper

The Julia Language The Julia Project March 14,2026 Contents Contents ii I Manual 1 1 Julia 1.7-beta2 Documentation 2 2 Getting Started 4 2.1 Resources 5 3 Variables 6 3.1 Allowed Variable Names 7 3.2 256 23.3 More task operations 259 23.4 Tasks and events 260 24 Multi-Threading 261 24.1 Starting Julia with multiple threads 261 24.2 Data-race freedom 262 24.3 The @threads Macro 263 24.4 Atomic Operations Calling C and Fortran Code 300 27.1 Creating C-Compatible Julia Function Pointers 302 27.2 Mapping C Types to Julia 304 27.3 Mapping C Functions to Julia 311 27.4 C Wrapper Examples 313 27.5 Fortran Wrapper