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Detect the presence of pread()/pwrite() system calls on unix systems and

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use them if available.

FossilOrigin-Name: 82cbf5ad2ed988a006106e188e98096a52e6779d
This commit is contained in:
drh 2016-03-04 03:20:05 +00:00
commit e808d7c1fe
6 changed files with 38 additions and 12 deletions
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12
config.h.in
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@ -45,6 +45,18 @@
/* Define to 1 if you have the <memory.h> header file. */
#undef HAVE_MEMORY_H
/* Define to 1 if you have the pread() function. */
#undef HAVE_PREAD
/* Define to 1 if you have the pread64() function. */
#undef HAVE_PREAD64
/* Define to 1 if you have the pwrite() function. */
#undef HAVE_PWRITE
/* Define to 1 if you have the pwrite64() function. */
#undef HAVE_PWRITE64
/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H

2
configure vendored
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@ -10273,7 +10273,7 @@ done
#########
# Figure out whether or not we have these functions
#
for ac_func in fdatasync gmtime_r isnan localtime_r localtime_s malloc_usable_size strchrnul usleep utime
for ac_func in fdatasync gmtime_r isnan localtime_r localtime_s malloc_usable_size strchrnul usleep utime pread pread64 pwrite pwrite64
do :
as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"

2
configure.ac
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@ -108,7 +108,7 @@ AC_CHECK_HEADERS([sys/types.h stdlib.h stdint.h inttypes.h malloc.h])
#########
# Figure out whether or not we have these functions
#
AC_CHECK_FUNCS([fdatasync gmtime_r isnan localtime_r localtime_s malloc_usable_size strchrnul usleep utime])
AC_CHECK_FUNCS([fdatasync gmtime_r isnan localtime_r localtime_s malloc_usable_size strchrnul usleep utime pread pread64 pwrite pwrite64])
#########
# By default, we use the amalgamation (this may be changed below...)

19
manifest
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@ -1,5 +1,5 @@
C Add\sthe\stest_bestindex.c\sfile\sto\sMakefile.in\sand\sMakefile.msc\sso\sthat\n"make\stest"\swill\swork\sagain.
D 2016-03-04T02:59:35.823
C Detect\sthe\spresence\sof\spread()/pwrite()\ssystem\scalls\son\sunix\ssystems\sand\nuse\sthem\sif\savailable.
D 2016-03-04T03:20:05.475
F Makefile.in 4c3d3d1b98454bf60e8977223b26ef30777a2bf2
F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
F Makefile.msc 0dc13352b84b257d81736076d8101a584940c409
@ -28,10 +28,10 @@ F autoconf/tea/win/makefile.vc f89d0184d0eee5f7e356ea407964dcd139939928
F autoconf/tea/win/nmakehlp.c 247538ad8e8c508f33c03ec1fbd67d3a07ef6291
F autoconf/tea/win/rules.vc c511f222b80064096b705dbeb97060ee1d6b6d63
F config.guess 226d9a188c6196f3033ffc651cbc9dcee1a42977
F config.h.in 42b71ad3fe21c9e88fa59e8458ca1a6bc72eb0c0
F config.h.in 6376abec766e9a0785178b1823b5a587e9f1ccbc
F config.sub 9ebe4c3b3dab6431ece34f16828b594fb420da55
F configure 0339a635cd2943a3b56000a10a11b4b2e6ed6d1b x
F configure.ac a2224b1162f79848982d3618ac1deffcd94e88ec
F configure c01a159fdf7ea0171ad01ce2937283f2c7972bde x
F configure.ac 89e4e02a83d8a1528011f8395621b8c3186b4089
F contrib/sqlitecon.tcl 210a913ad63f9f991070821e599d600bd913e0ad
F doc/lemon.html c30255bea0fd87a81f082d17a72c9dffbc3f6dd9
F doc/pager-invariants.txt 27fed9a70ddad2088750c4a2b493b63853da2710
@ -333,7 +333,7 @@ F src/os.c ca9a104b677328ee037cfdf1a54a16fd1805e8c9
F src/os.h 3e57a24e2794a94d3cf2342c6d9a884888cd96bf
F src/os_common.h b2f4707a603e36811d9b1a13278bffd757857b85
F src/os_setup.h c9d4553b5aaa6f73391448b265b89bed0b890faa
F src/os_unix.c 3a6f20736dfb8a0949cdd66553fdf59f6604be35
F src/os_unix.c f5bac8e74aaefc4ea520e43b4540793c3b8a9e8f
F src/os_win.c f0d7aa603eb6262143d7169a222aea07c4fca91d
F src/os_win.h eb7a47aa17b26b77eb97e4823f20a00b8bda12ca
F src/pager.c d034c69b958c01289eb8070cbf902e1a68cd7e0b
@ -1453,7 +1453,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P 16fbf2e19c22df9441aef5c8b7f5670adc38a6b6
R 7c159ecc947e100f72a0b55ddd229f42
P 6ec6b6a97e62be1abe1e349b5bc04c6f5ae88968 38fb54e7854ac0500a88585ff9dd7487b4b2e586
R 2f3feca250b12264f442f8836aa34529
T +closed 38fb54e7854ac0500a88585ff9dd7487b4b2e586
U drh
Z bb6e56d7a0bd406da0bf812970d93fdb
Z 6deed976f37e6ab4c44908da24567cb0

2
manifest.uuid
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@ -1 +1 @@
6ec6b6a97e62be1abe1e349b5bc04c6f5ae88968
82cbf5ad2ed988a006106e188e98096a52e6779d

13
src/os_unix.c
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@ -71,6 +71,19 @@
# endif
#endif
/* Use pread() and pwrite() if they are available */
#if defined(__APPLE__)
# define HAVE_PREAD 1
# define HAVE_PWRITE 1
#endif
#if defined(HAVE_PREAD64) && defined(HAVE_PWRITE64)
# undef USE_PREAD
# define USE_PREAD64 1
#elif defined(HAVE_PREAD) && defined(HAVE_PWRITE)
# undef USE_PREAD64
# define USE_PREAD 1
#endif
/*
** standard include files.
*/