0d7d1fccff
The goal here is to avoid potentially expensive fork()ing. The time for a fork() is (for a process with no real heap usage and thus few areas) 300-400us on my system. load_image() takes 3000us (3ms) or so, but this of course includes exec() time. Overall, for compiling HaikuDepot (with a tweaked jam to use posix_spawn on Haiku, not just on Linux) there is a slight decrease in time: before: real 1m21.727s user 1m2.131s sys 0m43.029s after: real 1m19.472s user 1m1.752s sys 0m41.740s Which is probably within the realm of "noise", so more benchmarks are needed. Likely if we tweak our jam usage to not need as many shells when running commands, this would be a much more noticeable change. Change-Id: I217f2476b1ed9aa18322b3c2bc8986571d89549a
66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/*
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* Copyright 2004-2009, Axel Dörfler, axeld@pinc-software.de.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef LIBROOT_PRIVATE_H
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#define LIBROOT_PRIVATE_H
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#include <SupportDefs.h>
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#include <image.h>
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struct user_space_program_args;
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struct real_time_data;
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int __gABIVersion;
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extern int __gAPIVersion;
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extern char _single_threaded;
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/* This determines if a process runs single threaded or not */
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status_t __look_up_in_path(const char *name, char *buffer);
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status_t __parse_invoke_line(char *invoker, char ***_newArgs,
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char * const **_oldArgs, int32 *_argCount, const char *arg0);
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status_t __get_next_image_dependency(image_id id, uint32 *cookie,
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const char **_name);
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status_t __test_executable(const char *path, char *invoker);
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status_t __flatten_process_args(const char* const* args, int32 argCount,
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const char* const* env, int32* envCount, const char* executablePath,
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char*** _flatArgs, size_t* _flatSize);
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thread_id __load_image_at_path(const char* path, int32 argCount,
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const char **args, const char **environ);
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void _call_atexit_hooks_for_range(addr_t start, addr_t size);
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void __init_env(const struct user_space_program_args *args);
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void __init_env_post_heap(void);
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status_t __init_heap(void);
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void __heap_terminate_after(void);
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void __heap_before_fork(void);
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void __heap_after_fork_child(void);
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void __heap_after_fork_parent(void);
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void __heap_thread_init(void);
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void __heap_thread_exit(void);
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void __init_time(addr_t commPageTable);
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void __arch_init_time(struct real_time_data *data, bool setDefaults);
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bigtime_t __arch_get_system_time_offset(struct real_time_data *data);
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bigtime_t __get_system_time_offset();
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void __init_pwd_backend(void);
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void __reinit_pwd_backend_after_fork(void);
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int32 __arch_get_stack_trace(addr_t* returnAddresses, int32 maxCount,
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int32 skipFrames, addr_t stackBase, addr_t stackEnd);
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void __set_stack_protection(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* LIBROOT_PRIVATE_H */
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