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authorUlrich Drepper <drepper@redhat.com>2001-04-09 18:07:15 +0000
committerUlrich Drepper <drepper@redhat.com>2001-04-09 18:07:15 +0000
commit4c78249d06de46901afafab3ff32b858b8c739ed (patch)
tree3c45281ff11bd3d0c584ff8382b24a5cdf13d281 /manual
parenteacde9d0818dac743bc5c2562e35f0a6e949327e (diff)
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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.texi82
-rw-r--r--manual/resource.texi4
-rw-r--r--manual/startup.texi2
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.