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36 lines
1.1 KiB
Groff
36 lines
1.1 KiB
Groff
15 years ago
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.TH "<alloca.h>: Allocate space in the stack" 3 "4 Dec 2008" "Version 1.6.4" "avr-libc" \" -*- nroff -*-
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.ad l
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.nh
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.SH NAME
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<alloca.h>: Allocate space in the stack \-
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.SH "Detailed Description"
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.PP
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.PP
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.SS "Functions"
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.in +1c
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.ti -1c
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.RI "void * \fBalloca\fP (size_t __size)"
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.br
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.in -1c
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.SH "Function Documentation"
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.PP
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.SS "void* alloca (size_t __size)"
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.PP
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Allocate \fI__size\fP bytes of space in the stack frame of the caller.
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.PP
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This temporary space is automatically freed when the function that called \fBalloca()\fP returns to its caller. Avr-libc defines the \fBalloca()\fP as a macro, which is translated into the inlined \fC__builtin_alloca()\fP function. The fact that the code is inlined, means that it is impossible to take the address of this function, or to change its behaviour by linking with a different library.
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.PP
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\fBReturns:\fP
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.RS 4
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\fBalloca()\fP returns a pointer to the beginning of the allocated space. If the allocation causes stack overflow, program behaviour is undefined.
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.RE
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.PP
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\fBWarning:\fP
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.RS 4
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Avoid use \fBalloca()\fP inside the list of arguments of a function call.
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.RE
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.PP
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