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Internal Interface Functions
5-17
F
Interface Function
The Com p ile r always generate s the F interface function, which contains the
“normal” C++ interface to the function. This code is the corresponding C++
interface function (
gasket) from the Sierpinski Gasket example. This function
calls the C++ code.
N
F
Interface Function
The Compiler produces this interface function only when the M -function uses
the variable
nargout.Thenargout interface allows the number of requested
outputstobespecifiedviathe
nargout argument, as opposed to the normal
interface that dynamically calculates the number of outputs based on the
number of non-null inputs it receives.
This is the corresponding
NF interface function (NFoo)forthefoo.m example
described earlier in this chapter. This function calls the
Mfoo function
appearing in
foo.cpp.
//
// The function "Nfoo" contains the nargout interface for
// the "foo" M-function from file
// "<matlab>\extern\examples\compiler\foo.m" (lines 1-8).
// This interface is only produced if the M-function uses
// the special variable "nargout". The nargout interface
// allows the number of requested outputs to be specified
// via the nargout argument, as opposed to the normal
//
// The function "gasket" contains the normal interface for
// the "gasket" M-function from file
// "<matlab>\extern\examples\compiler\gasket.m" (lines 1-23).
// This function processes any input arguments and passes
// them to the implementation version of the function,
// appearing above.
//
mwArray gasket(mwArray numPoints) {
int nargout(1);
mwArray theImage(mclGetUninitializedArray());
theImage = Mgasket(nargout, numPoints);
return theImage;
}
Call M-function
Output argument
processing
- MATLAB Compiler 1
- How to Contact The MathWorks: 2
- Controlling Code Generation 6
- Error and Warning Messages 9
- Contents 10
- Introducing the 11
- Introduction 12
- Optimizations 13
- Additional Language Support 15
- Running Compiler from MATLAB 15
- Uses of the Compiler 17
- C Stand-Alone Applications 19
- C++ Stand-Alone Applications 19
- The MATLAB Compiler Family 22
- Generated Code Types 22
- Generated Wrapper Types 22
- Target Types 22
- Why Compile M-Files? 24
- Compatibility 26
- Installation 26
- Changed Library Name 26
- Changed Data Type Names 26
- Limitations and Restrictions 27
- Stand-Alone Applications 28
- Installation and 31
- Configuration 31
- UNIX Workstation 35
- Compiler Options Files 36
- Locating Options Files 37
- ANSI C or C++ Compiler 38
- Things to Be Aware of 38
- Choosing a Compiler 38
- Changing Compilers 39
- Creating MEX-Files 40
- Verifying from MATLAB 42
- Microsoft Windows on PCs 44
- Using an IDE 53
- Troubleshooting 56
- Troubleshooting the Compiler 58
- Getting Started 59
- How the Function Works 61
- Invoking the M-File 62
- Invoking the MEX-File 63
- Compiler Options and Macros 65
- Using the -S Option 66
- Using the -u and -y Options 67
- Sample Time 67
- Data Type 68
- Stand-Alone 71
- Applications 71
- MEX-Files 73
- Overview 75
- Introducing mbuild 77
- Using the System Compiler 79
- Locating Shared Libraries 82
- Running Your Application 83
- About the mbuild Script 85
- Shared Libraries 92
- Add-ins and Macro Files tab 95
- Building Shared Libraries 97
- 4 Stand-Alone Applications 100
- Coding with M-Files Only 101
- Mixing M-Files and C or C++ 107
- The Build Process 108
- An Explanation of mrankp.c 111
- An Explanation of This C Code 114
- Controlling 117
- Code Generation 117
- 5 Controlling Code Generation 118
- Code Generation Overview 119
- Sierpinski Gasket M-File 119
- The Generated Header Files 124
- C++ Header File 125
- Internal Interface Functions 127
- Interface Function 127
- Supported Executable Types 136
- POSIX Main Wrapper 137
- Simulink S-Functions 139
- C Libraries 139
- Default Width 145
- Setting Indentation Spacing 147
- Modified Indentation 149
- Comments Annotation 150
- All Annotation 151
- Include #line Directives 153
- Using feval 158
- Compiling MEX-Files 159
- Print Handlers 160
- Registering a Print Handler 161
- Writing a Print Handler 161
- Example Files 164
- Registering the Print Handler 165
- Building the Executable 167
- Testing the Executable 167
- Optimizing Performance 169
- 6 Optimizing Performance 170
- Optimization Bundles 171
- Turn On All Optimizations 171
- Turn Off All Optimizations 171
- List All Optimizations 172
- Optimizing Arrays 173
- Optimizing Loops 175
- Optimizing Conditionals 178
- Reference 179
- Command Line Tools 181
- Compiler pragmas 182
- , %#function,and%#mex 182
- 7%#external 183
- Syntax %#external 183
- 7%#function 184
- Purpose feval pragma 184
- Purpose mex pragma 185
- Syntax %#mex 185
- Functions 186
- Syntax mbchar(x) 187
- Description The statement 187
- Syntax mbcharscalar(x) 188
- Syntax mbcharvector(x) 189
- Syntax mbint(n) 190
- , mbintvector, mcc 191
- Syntax mbintscalar(n) 192
- See Also mbint, mbscalar, mcc 192
- Syntax mbintvector(n) 193
- Syntax mbreal(n) 194
- Syntax mbrealscalar(n) 195
- Syntax mbrealvector(n) 196
- Syntax mbscalar(n) 197
- Syntax mbvector(n) 198
- 7reallog 199
- Syntax Y = reallog(X) 199
- 7realpow 200
- Syntax Z = realpow(X,Y) 200
- 7realsqrt 201
- Syntax Y = realsqrt(X) 201
- Command Line Syntax 208
- Setting Up Default Options 210
- Handling Full Pathnames 212
- Compiling Embedded M-Files 213
- Macro Options 214
- Code Generation Options 216
- Quick Reference 227
- Common Uses of the Compiler 228
- Specifies path for library 233
- Displays help message 233
- Error and Warning 235
- Messages 235
- B Error and Warning Messages 236
- Compile-Time Errors 237
- Warning Messages 247
- Run-Time Errors 253
- -x option flag 7-37 264
- -Y option flag 7-45 264
- -y option flag 3-9, 7-42 264
- -z option flag 7-46 264
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