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author | Ulrich Drepper <drepper@redhat.com> | 2001-04-09 18:07:15 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2001-04-09 18:07:15 +0000 |
commit | 4c78249d06de46901afafab3ff32b858b8c739ed (patch) | |
tree | 3c45281ff11bd3d0c584ff8382b24a5cdf13d281 /manual | |
parent | eacde9d0818dac743bc5c2562e35f0a6e949327e (diff) | |
download | glibc-4c78249d06de46901afafab3ff32b858b8c739ed.zip glibc-4c78249d06de46901afafab3ff32b858b8c739ed.tar.gz glibc-4c78249d06de46901afafab3ff32b858b8c739ed.tar.bz2 |
Update.
2001-04-09 Ulrich Drepper <drepper@redhat.com>
* Makefile (distribute): Add scripts/documented.sh.
* scripts/documented.sh: New file.
Diffstat (limited to 'manual')
-rw-r--r-- | manual/math.texi | 82 | ||||
-rw-r--r-- | manual/resource.texi | 4 | ||||
-rw-r--r-- | manual/startup.texi | 2 |
3 files changed, 73 insertions, 15 deletions
diff --git a/manual/math.texi b/manual/math.texi index 1ec5977..6eba775 100644 --- a/manual/math.texi +++ b/manual/math.texi @@ -236,9 +236,9 @@ the implementation.) These functions return the complex sine of @var{z}. The mathematical definition of the complex sine is -@ifinfo +@ifnottex @math{sin (z) = 1/(2*i) * (exp (z*i) - exp (-z*i))}. -@end ifinfo +@end ifnottex @tex $$\sin(z) = {1\over 2i} (e^{zi} - e^{-zi})$$ @end tex @@ -256,9 +256,9 @@ $$\sin(z) = {1\over 2i} (e^{zi} - e^{-zi})$$ These functions return the complex cosine of @var{z}. The mathematical definition of the complex cosine is -@ifinfo +@ifnottex @math{cos (z) = 1/2 * (exp (z*i) + exp (-z*i))} -@end ifinfo +@end ifnottex @tex $$\cos(z) = {1\over 2} (e^{zi} + e^{-zi})$$ @end tex @@ -276,9 +276,9 @@ $$\cos(z) = {1\over 2} (e^{zi} + e^{-zi})$$ These functions return the complex tangent of @var{z}. The mathematical definition of the complex tangent is -@ifinfo +@ifnottex @math{tan (z) = -i * (exp (z*i) - exp (-z*i)) / (exp (z*i) + exp (-z*i))} -@end ifinfo +@end ifnottex @tex $$\tan(z) = -i \cdot {e^{zi} - e^{-zi}\over e^{zi} + e^{-zi}}$$ @end tex @@ -723,9 +723,9 @@ These functions return @code{e} (the base of natural logarithms) raised to the power of @var{z}. Mathematically, this corresponds to the value -@ifinfo +@ifnottex @math{exp (z) = exp (creal (z)) * (cos (cimag (z)) + I * sin (cimag (z)))} -@end ifinfo +@end ifnottex @tex $$\exp(z) = e^z = e^{{\rm Re}\,z} (\cos ({\rm Im}\,z) + i \sin ({\rm Im}\,z))$$ @end tex @@ -743,9 +743,9 @@ $$\exp(z) = e^z = e^{{\rm Re}\,z} (\cos ({\rm Im}\,z) + i \sin ({\rm Im}\,z))$$ These functions return the natural logarithm of @var{z}. Mathematically, this corresponds to the value -@ifinfo +@ifnottex @math{log (z) = log (cabs (z)) + I * carg (z)} -@end ifinfo +@end ifnottex @tex $$\log(z) = \log |z| + i \arg z$$ @end tex @@ -769,9 +769,9 @@ or is very close to 0. It is well-defined for all other values of These functions return the base 10 logarithm of the complex value @var{z}. Mathematically, this corresponds to the value -@ifinfo +@ifnottex @math{log (z) = log10 (cabs (z)) + I * carg (z)} -@end ifinfo +@end ifnottex @tex $$\log_{10}(z) = \log_{10}|z| + i \arg z$$ @end tex @@ -1411,6 +1411,64 @@ restore that state. If the function fails the return value is @code{NULL}. @end deftypefun +The four functions described so far in this section all work on a state +which is shared by all threads. The state is not directly accessible to +the user and can only be modified by these functions. This makes it +hard to deal with situations where each thread should have its own +pseudo-random number generator. + +The GNU C library contains four additional functions which contain the +state as an explicit parameter and therefore make it possible to handle +thread-local PRNGs. Beside this there are no difference. In fact, the +four functions already discussed are implemented internally using the +following interfaces. + +The @file{stdlib.h} header contains a definition of the following type: + +@comment stdlib.h +@comment GNU +@deftp {Data Type} {struct random_data} + +Objects of type @code{struct random_data} contain the information +necessary to represent the state of the PRNG. Although a complete +definition of the type is present the type should be treated as opaque. +@end deftp + +The functions modifying the state follow exactly the already described +functions. + +@comment stdlib.h +@comment GNU +@deftypefun int random_r (struct random_data *restrict @var{buf}, int32_t *restrict @var{result}) +The @code{random_r} function behaves exactly like the @code{random} +function except that it uses and modifies the state in the object +pointed to by the first parameter instead of the global state. +@end deftypefun + +@comment stdlib.h +@comment GNU +@deftypefun int srandom_r (unsigned int @var{seed}, struct random_data *@var{buf}) +The @code{srandom_r} function behaves exactly like the @code{srandom} +function except that it uses and modifies the state in the object +pointed to by the second parameter instead of the global state. +@end deftypefun + +@comment stdlib.h +@comment GNU +@deftypefun int initstate_r (unsigned int @var{seed}, char *restrict @var{statebuf}, size_t @var{statelen}, struct random_data *restrict @var{buf}) +The @code{initstate_r} function behaves exactly like the @code{initstate} +function except that it uses and modifies the state in the object +pointed to by the fourth parameter instead of the global state. +@end deftypefun + +@comment stdlib.h +@comment GNU +@deftypefun int setstate_r (char *restrict @var{statebuf}, struct random_data *restrict @var{buf}) +The @code{setstate_r} function behaves exactly like the @code{setstate} +function except that it uses and modifies the state in the object +pointed to by the first parameter instead of the global state. +@end deftypefun + @node SVID Random @subsection SVID Random Number Function diff --git a/manual/resource.texi b/manual/resource.texi index f9f2e7c..d0775b8 100644 --- a/manual/resource.texi +++ b/manual/resource.texi @@ -1379,7 +1379,7 @@ get this information two functions. They are declared in the file @comment sys/sysinfo.h @comment GNU -@deftypefun long int get_phys_pages (void) +@deftypefun {long int} get_phys_pages (void) The @code{get_phys_pages} function returns the total number of pages of physical the system has. To get the amount of memory this number has to be multiplied by the page size. @@ -1389,7 +1389,7 @@ This function is a GNU extension. @comment sys/sysinfo.h @comment GNU -@deftypefun long int get_avphys_pages (void) +@deftypefun {long int} get_avphys_pages (void) The @code{get_phys_pages} function returns the number of available pages of physical the system has. To get the amount of memory this number has to be multiplied by the page size. diff --git a/manual/startup.texi b/manual/startup.texi index 66c4a88..90f6a69 100644 --- a/manual/startup.texi +++ b/manual/startup.texi @@ -625,7 +625,7 @@ anyway. @comment unistd.h @comment ??? -@deftypefun long int syscall (long int @var{sysno}, ...) +@deftypefun {long int} syscall (long int @var{sysno}, ...) @code{syscall} performs a generic system call. |